CN114057442A - Masonry mortar capable of being pneumatically conveyed - Google Patents
Masonry mortar capable of being pneumatically conveyed Download PDFInfo
- Publication number
- CN114057442A CN114057442A CN202010769712.5A CN202010769712A CN114057442A CN 114057442 A CN114057442 A CN 114057442A CN 202010769712 A CN202010769712 A CN 202010769712A CN 114057442 A CN114057442 A CN 114057442A
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- machine
- made sand
- masonry mortar
- mixed
- mortar
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 91
- 239000004576 sand Substances 0.000 claims abstract description 84
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 11
- 229920003086 cellulose ether Polymers 0.000 claims abstract description 10
- 229920002472 Starch Polymers 0.000 claims abstract description 8
- 239000008107 starch Substances 0.000 claims abstract description 8
- 235000019698 starch Nutrition 0.000 claims abstract description 8
- 235000019738 Limestone Nutrition 0.000 claims abstract description 7
- 239000006028 limestone Substances 0.000 claims abstract description 7
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 32
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 9
- 239000012615 aggregate Substances 0.000 claims description 9
- 239000011398 Portland cement Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 10
- 206010016807 Fluid retention Diseases 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/26—Carbonates
- C04B14/28—Carbonates of calcium
Abstract
The invention provides masonry mortar capable of being pneumatically conveyed, which is formed by mixing pre-mixed dry-mixed masonry mortar and water, wherein the pre-mixed dry-mixed masonry mortar comprises the following components in percentage by mass: 12-18% of cement, 16-24% of powder, 56-66% of machine-made sand of 0-1.2mm, 0-16% of machine-made sand of 1.2-2.4mm, 0.03-0.055% of cellulose ether, 0.005-0.015% of starch ether and 0.05-0.1% of rubber powder, wherein the water adding amount during mixing is as follows: 15% -18%, and the manufacturing process comprises the following steps: crushing high-purity limestone to obtain machine-made sand; accurately weighing the required content of each component respectively to prepare premixed dry-mixed masonry mortar; and (3) mixing the premixed dry-mixed masonry mortar with water with the corresponding water addition amount, and uniformly mixing to obtain the finished product mortar. Compared with the prior art, the high-quality machine-made sand is used, and the gradation is better controllable; the invention can effectively carry out high-floor pneumatic conveying on materials, the materials are not separated and layered in the conveying process, no dust is raised, and no waste water is generated when the materials are conveyed by the traditional pumping equipment.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of building materials, in particular to masonry mortar capable of being pneumatically conveyed.
[ background of the invention ]
With the development of modern construction technology, the construction mortar used in engineering is also developing and innovating. The traditional building mortar is mixed on site and widely applied in engineering, but the quality cannot be effectively controlled, so that the requirement of the modern building industry cannot be met.
In order to better meet and realize the requirements of modern buildings, the novel building mortar, namely dry-mixed mortar, has the advantages of high product quality, environmental protection, convenient transportation and convenient construction. The mortar mainly comprises a cementing material, a fine aggregate, a mineral admixture, an additive and the like, is dried, weighed and uniformly stirred in a production plant, is bagged or transported in bulk to a construction site, is added with water and stirred according to the specification, and is directly used, wherein the dry-mixed masonry mortar is most commonly used. However, different masonry materials have different requirements on mortar performance, so that the materials are often stacked in a disordered way on a construction site or construction materials are often unclear or even used in a disordered way.
The masonry mortar capable of being pneumatically conveyed is finished mortar which is prepared by mixing fine aggregate selected according to requirements, a quantitative cementing material (such as cement) and various high-performance trace additives according to a certain proportion to form a powdery mixture and performing bulk loading or packaging in the form of dry powder. When the mortar is used, only water needs to be added and mixed, the quality is ensured, the mortar is convenient to construct, environment-friendly, good in aging resistance and strong in binding power, is high-performance environment-friendly masonry mortar, and solves the problem that material conveying needs a large amount of labor, time and single application.
The existing dry-mixed masonry mortar mostly uses river sand as aggregate, the dosage of the sand in the raw material of the mortar reaches about eighty percent, and the grading uncontrollability of the river sand causes the stepless grading concept in the mortar using the river sand, so the grading gear-off phenomenon is common. The stable grading in the mortar is one of the basic conditions for ensuring the quality of the mortar, however, the uncontrollable phenomenon of the grading of the river sand causes the uncontrollable phenomenon of the grading of the mortar, and the basic quality of the mortar is directly influenced. Meanwhile, materials are piled up and used in the dry-mixed mortar conveying process, the piling time is different, workers use the materials, the piling time of the materials is long, the conveying distance is long, the time consumption in various conveying processes is large, and the influence of frequent change of the materials on the construction efficiency is large.
[ summary of the invention ]
The invention aims to provide masonry mortar capable of being pneumatically conveyed, and the masonry mortar is used for overcoming the technical problems that the mortar gradation is uncontrollable due to uncontrollable river sand gradation in the prior art, meanwhile, materials are piled for use in the dry-mixed mortar conveying process, the piling time is different, the materials used by workers are long in piling time and long in conveying distance, time consumption in various conveying processes is large, and frequent change of the materials has great influence on the construction efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
the application discloses masonry mortar that can pneumatic conveying is formed by ready-mixed dry-mixed masonry mortar and water mixture, the component of ready-mixed dry-mixed masonry mortar includes aggregate, cement, powder and additive, the aggregate adopts mechanism sand, mechanism sand includes that the particle diameter is 0 ~ 1.2 mm's mechanism sand and 1.2 ~ 2.4 mm's mechanism sand, the additive includes cellulose ether, starch ether and rubber powder, the mass fraction of each component of ready-mixed dry-mixed masonry mortar is as follows: 12-18% of cement, 16-24% of powder, 56-66% of machine-made sand of 0-1.2mm, 0-16% of machine-made sand of 1.2-2.4mm, 0.03-0.055% of cellulose ether, 0.005-0.015% of starch ether and 0.05-0.1% of rubber powder, wherein the water adding amount during mixing is as follows: 15% -18%, and the manufacturing process comprises the following steps:
a) crushing high-purity limestone to obtain machine-made sand, feeding the machine-made sand into a sieving machine by using a lifting machine, and dividing the crushed machine-made sand into two particle sizes of 0-1.2mm and 1.2-2.4mm, and respectively feeding the two particle sizes into a sand warehouse;
b) conveying the machine-made sand, the cement, the powder and the additive into respective weighing scales by using a packing auger respectively, and accurately weighing the required content of each component respectively to prepare the ready-mixed dry-mixed masonry mortar;
c) and (3) putting the premixed dry-mixed masonry mortar and water with the corresponding water addition amount into a stirrer for mixing for more than 120 seconds, and uniformly mixing to obtain the finished product mortar.
Preferably, the cement is P.042.5R ordinary portland cement.
Preferably, the powder is the powder sucked out by dust absorption in the process of crushing the high-purity limestone in the step a), and the particle size of the powder is less than 0.075 mm.
Preferably, the fineness modulus of the machine-made sand is 2.4-2.5, the powder content of less than 0.075mm is less than or equal to 12%, and the mud content is less than or equal to 3%.
Preferably, the machine-made sand with the particle size of 0-1.2mm and the machine-made sand with the particle size of 1.2-2.4mm respectively comprise 2.4mm, 1.2mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm and a chassis according to the mortar grading, and the machine-made sand content in the pre-mixed dry-mixed masonry mortar is 0-4% of the machine-made sand with the particle size of 2.4mm, 15-21% of the machine-made sand with the particle size of 1.2mm, 12-18% of the machine-made sand with the particle size of 0.6mm, 12-18% of the machine-made sand with the particle size of 0.3mm, 7-13% of the machine-made sand with the particle size of 0.15mm, 7-13% of the machine-made sand with the particle size of 0.075mm and 28-32% of the chassis.
The invention has the beneficial effects that:
(1) compared with the uncontrollable property of common river sand (the river sand is natural sand, a stepless distribution concept is adopted, and the grading broken gear phenomenon is common), the grading has better controllability and can ensure the stability of the high-quality machine-made sand;
(2) the reasonable selection of the mixing proportion of the mortar enables the product to have the characteristics of workability, water retention, cohesiveness, fluidity, durability, pneumatic conveying and the like, and the mortar is convenient and fast to construct, controllable in quality and environment-friendly;
(3) the cellulose ether plays a role in water retention and thickening, increases the water retention of the mortar, prevents the mortar from overflowing, increases the output of the mortar on the premise of ensuring that the strength of the mortar is qualified, and simultaneously improves the construction property of the mortar;
(4) the invention can effectively carry out high-floor pneumatic conveying on materials, the materials are not separated and layered in the conveying process, no dust is raised, and no waste water is generated when the materials are conveyed by the traditional pumping equipment.
The features and advantages of the present invention will be described in detail by way of examples.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by examples below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The embodiment of the invention provides masonry mortar capable of being conveyed pneumatically, which is formed by mixing premixed dry-mixed masonry mortar and water, wherein the premixed dry-mixed masonry mortar comprises aggregate, cement, powder and an additive, the aggregate adopts machine-made sand, the machine-made sand comprises machine-made sand with the particle size of 0-1.2mm and machine-made sand with the particle size of 1.2-2.4mm, the additive comprises cellulose ether, starch ether and rubber powder, and the premixed dry-mixed masonry mortar comprises the following components in parts by mass: 12-18% of cement, 16-24% of powder, 56-66% of machine-made sand of 0-1.2mm, 0-16% of machine-made sand of 1.2-2.4mm, 0.03-0.055% of cellulose ether, 0.005-0.015% of starch ether and 0.05-0.1% of rubber powder, wherein the water adding amount during mixing is as follows: 15% -18%, and the manufacturing process comprises the following steps: crushing high-purity limestone to obtain machine-made sand, feeding the machine-made sand into a sieving machine by using a lifting machine, and dividing the crushed machine-made sand into two particle sizes of 0-1.2mm and 1.2-2.4mm, and respectively feeding the two particle sizes into a sand warehouse; conveying the machine-made sand, the cement, the powder and the additive into respective weighing scales by using a packing auger respectively, and accurately weighing the required content of each component respectively to prepare the ready-mixed dry-mixed masonry mortar; and (3) putting the premixed dry-mixed masonry mortar and water with the corresponding water addition amount into a stirrer for mixing for more than 120 seconds, and uniformly mixing to obtain the finished product mortar. The cement is P.042.5R ordinary portland cement. The powder material is the powder material sucked out by dust absorption in the process of crushing the high-purity limestone in the step a), and the particle size of the powder material is less than 0.075 mm. The fineness modulus of the machine-made sand is 2.4-2.5, the powder content of less than 0.075mm is less than or equal to 12%, and the mud content is less than or equal to 3%.
The target required product performance test data is as follows:
the test data of the influence of the powder content on the pneumatic conveying are as follows:
according to the data in the table, the pneumatic mortar conveying is closely related to the powder content in the mortar material, the pipeline is easy to block during the conveying process when the powder content is lower than 28 percent, and the residual material of the material in the pipeline is large.
The test data of the influence of the machine-made sand with the grain diameter of more than 1.2mm on the pneumatic conveying mortar are as follows:
according to the data in the table, the pneumatic conveying of the mortar is closely related to coarse particles (particles with the particle size of more than 1.2 mm) in the mortar material, and the pneumatic conveying of the mortar is easily seriously separated when the pneumatic conveying of the mortar is conveyed to a floor construction surface when the pneumatic conveying of the mortar is higher than 24 percent.
Therefore, the ideal dry-mixed pneumatically-conveyed mortar has the following grading:
the content of the machine-made sand in the premixed dry-mixed masonry mortar is 0-4% of machine-made sand with the thickness of 2.4mm, 15-21% of machine-made sand with the thickness of 1.2mm, 12-18% of machine-made sand with the thickness of 0.6mm, 12-18% of machine-made sand with the thickness of 0.3mm, 7-13% of machine-made sand with the thickness of 0.15mm, 7-13% of machine-made sand with the thickness of 0.075mm and 28-32% of a chassis.
The gradation of the machine-made sand is reasonable and stable, the manual control is realized, the quality of the mortar can be stabilized after the gradation of the sand is stable, and the dry-mixed mortar using the common river sand has uncontrollable sand source, the gradation is more random and can not accurately control the gradation change of the sand, so that the quality of the mortar can also have more uncertain factors. Therefore, various used additives can be correspondingly adjusted according to different working conditions and environments, the cellulose ether plays a role in water retention and thickening, the water retention property of the mortar is increased, the overflow phenomenon is avoided, the output of the mortar is increased on the premise of ensuring the qualified mortar strength, and meanwhile, the constructability of the mortar is also improved. The ready-mixed dry-mixed masonry mortar comprises the following components in percentage by mass: 42.5 strength ordinary portland cement: 12% -18% of stone powder: 16-24% of machine-made sand with the thickness of 0-1.2 mm: 56% -66% and machine-made sand of 1.2-2.4 mm: 0-16%, cellulose ether: 0.03% -0.055%, starch ether: 0.005-0.015% and rubber powder: 0.05-0.1%, water adding amount when in use: 15 to 18 percent. The invention can effectively carry out high-floor pneumatic conveying on materials, the materials are not separated and not layered in the conveying process, no dust is raised, and no waste water is generated when the materials are conveyed by traditional pumping equipment. The construction efficiency is improved, the environmental pollution is reduced, and the mortar is nontoxic and environment-friendly and is a development direction of pneumatic conveying masonry mortar.
The invention is compared with three materials in the market:
as can be seen from the above table, the pneumatically transportable masonry mortar of the present invention is superior in all respects to the three materials available on the market.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. The masonry mortar capable of being pneumatically conveyed is formed by mixing pre-mixed dry-mixed masonry mortar and water, wherein the components of the pre-mixed dry-mixed masonry mortar comprise aggregate, cement, powder and additives, and the masonry mortar is characterized in that: the aggregate is machine-made sand, the machine-made sand comprises machine-made sand with the particle size of 0-1.2mm and machine-made sand with the particle size of 1.2-2.4mm, the additive comprises cellulose ether, starch ether and rubber powder, and the premixed dry-mixed masonry mortar comprises the following components in percentage by mass: 12-18% of cement, 16-24% of powder, 56-66% of machine-made sand of 0-1.2mm, 0-16% of machine-made sand of 1.2-2.4mm, 0.03-0.055% of cellulose ether, 0.005-0.015% of starch ether and 0.05-0.1% of rubber powder, wherein the water adding amount during mixing is as follows: 15% -18%, and the manufacturing process comprises the following steps:
a) crushing high-purity limestone to obtain machine-made sand, feeding the machine-made sand into a sieving machine by using a lifting machine, and dividing the crushed machine-made sand into two particle sizes of 0-1.2mm and 1.2-2.4mm, and respectively feeding the two particle sizes into a sand warehouse;
b) conveying the machine-made sand, the cement, the powder and the additive into respective weighing scales by using a packing auger respectively, and accurately weighing the required content of each component respectively to prepare the ready-mixed dry-mixed masonry mortar;
c) and (3) putting the premixed dry-mixed masonry mortar and water with the corresponding water addition amount into a stirrer for mixing for more than 120 seconds, and uniformly mixing to obtain the required machine-made sand-based rapid-setting weighbridge mortar.
2. A pneumatically conveyable masonry mortar according to claim 1, characterized in that: the cement is P.042.5R ordinary portland cement.
3. A pneumatically conveyable masonry mortar according to claim 1, characterized in that: the powder material is the powder material sucked out by dust absorption in the process of crushing the high-purity limestone in the step a), and the particle size of the powder material is less than 0.075 mm.
4. A pneumatically conveyable masonry mortar according to claim 1, characterized in that: the fineness modulus of the machine-made sand is 2.4-2.5, the powder content of less than 0.075mm is less than or equal to 12%, and the mud content is less than or equal to 3%.
5. A pneumatically conveyable masonry mortar according to claim 1, characterized in that: the machine-made sand with the particle size of 0-1.2mm and the machine-made sand with the particle size of 1.2-2.4mm are divided into 2.4mm, 1.2mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm and a chassis according to mortar grades, and the content of the machine-made sand in the pre-mixed dry-mixed masonry mortar is 0-4% of the machine-made sand with the particle size of 2.4mm, 15-21% of the machine-made sand with the particle size of 1.2mm, 12-18% of the machine-made sand with the particle size of 0.6mm, 12-18% of the machine-made sand with the particle size of 0.3mm, 7-13% of the machine-made sand with the particle size of 0.15mm, 7-13% of the machine-made sand with the particle size of 0.075mm and 28-32% of the chassis.
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| CN202010769712.5A CN114057442A (en) | 2020-08-04 | 2020-08-04 | Masonry mortar capable of being pneumatically conveyed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010429A (en) * | 2022-05-31 | 2022-09-06 | 同济大学 | Mortar material suitable for robot brick laying and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010429A (en) * | 2022-05-31 | 2022-09-06 | 同济大学 | Mortar material suitable for robot brick laying and preparation method thereof |
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