CN110482929A - Machine-made sand concrete and its preparation process - Google Patents
Machine-made sand concrete and its preparation process Download PDFInfo
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- CN110482929A CN110482929A CN201910765127.5A CN201910765127A CN110482929A CN 110482929 A CN110482929 A CN 110482929A CN 201910765127 A CN201910765127 A CN 201910765127A CN 110482929 A CN110482929 A CN 110482929A
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- 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
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The present invention relates to a kind of machine-made sand concrete of technical field of concrete preparation and its preparation processes, it includes the component of following parts by weight, 155-165 parts of water, 200-220 parts of cement, 80-100 parts of flyash, 60-80 parts of miberal powder, 520-550 parts of Machine-made Sand, non-irrigated 300-340 parts of sand, 950-1000 parts of stone, 10.5-11.5 parts of additive；And including following preparation step；Step 1: stirring 20-40S after Machine-made Sand, non-irrigated sand and stone are mixed, obtain the first mixture；Step 2: stirring 30-35S in the first mixture is added in flyash, miberal powder, cement and obtains the second mixture；Step 3: additive being added into the second concrete and water continues to stir 30-40S up to machine-made sand concrete.For the workability for improving machine-made sand concrete, therefore suitable non-irrigated sand is added, improves influence of the presence to concrete performance of the mountain flour in excessive Machine-made Sand；And the addition of additive further improves workability in component, the distress in concrete of preparation is few.
Description
Technical field
The present invention relates to the technical fields of concrete preparation, more particularly, to a kind of machine-made sand concrete and its preparation work
Skill.
Background technique
Concrete is generally made of coarse aggregate, fine aggregate, cement, additive, water and additive.Wherein, sand belongs to carefully
Gather materials, quality will account for 30% or so.Sandy plain is formed under field conditions (factors) by rock, admittedly claim natural sand.With economy
Development, natural sand resource is increasingly exhausted, the excessive exploitation of natural sand, also results in enormous pressure to environment, ecology.It is same with this
When, China's infrastructure project is growing day by day, and Machine-made Sand is made to come into being, and Machine-made Sand substitution natural sand has become as building sand
A kind of trend.
Machine-made Sand is passed through as rock except made of native exploitation, Mechanical Crushing, screening, nominal particle diameter is less than the rock grain of 5mm
Diameter particle.
Machine-made Sand passes through break process, and particle is in irregular form, and stone matter is hard, and specific surface area is compared with river sand more
Greatly, adhesive property is preferable, and preferable bonding effect can be formed with cement.But the grain composition of Machine-made Sand is poor, is greater than 2.5mm
It is on the high side with the particle less than 0.08mm, the workability of concrete is easily influenced, is easily had an adverse effect to the presentation quality of concrete,
Machine-made Sand it is multi-angular, shaggy characteristic cause preparation concrete workability it is poor, performance is bad.
Summary of the invention
The object of the present invention is to provide a kind of machine-made sand concretes, have the excellent of the workability for improving machine-made sand concrete
Point.
Foregoing invention purpose of the invention has the technical scheme that
A kind of machine-made sand concrete, the component including following parts by weight, 155-165 parts of water, 200-220 parts of cement, powder
80-100 parts of coal ash, 60-80 parts of miberal powder, 520-550 parts of Machine-made Sand, non-irrigated 300-340 parts of sand, 950-1000 parts of stone, additive
10.5-11.5 parts.
By using above-mentioned technical proposal, the addition of flyash can reach the function and effect for reducing cement consumption, and powder
The globular glass body contained in coal ash can be such that the yield shear stress of mixture is effectively reduced, and then there have mixture to be biggish
Mobility, while mixing suitable flyash and can also improve the cohesiveness and workability of concrete mix, while powder well
Bead particles in coal ash can play the role of intercepting to bleeding channel, and the water-retaining property of mixture can be improved.
Miberal powder be powder, including calcium oxide, iron oxide, magnesia with the middle hydraulicity generated during smelting iron etc. at
Point, reduction cement consumption can be reached, reduce the effect of adiabatic temperature rise, while concrete construction performance can be effectively improved, improved mixed
Solidifying soil later strength and the endurance qualities such as resisting erosion of sulfate and villaumite dialysis.
It is because the presence of mountain flour can significantly improve concrete that Machine-made Sand, which can enhance the main reason for concrete,
Pore character, improve slurry-aggregate Interface structure, and concrete crystal phase has different degrees of change.But in Machine-made Sand
The increase of the content of mountain flour, is easy to appear the plastic cracking time advance of machine-made sand concrete, the cracking resistance grade of concrete with
The content of stone powder of machine-made sand concrete increases and reduces, so cooperation joined non-irrigated sand in present specification, the addition of non-irrigated sand is risen
The effect adjusted has been arrived, has on the one hand been used as aggregate, opening for the use appearance of a large amount of Machine-made Sand on the other hand can be improved
Split situation.
In addition the use of additive can further improve the performance of concrete.
By the reasonable cooperation of Machine-made Sand and non-irrigated sand component in said components, and it joined miberal powder and flyash, phase interworking
It closes, the performance workability of the concrete prepared is good, has good workability.
The present invention is further arranged to: the component including following parts by weight, 150-160 parts of water, 200-210 parts of cement,
90-95 parts of flyash, 70-75 parts of miberal powder, 530-540 parts of Machine-made Sand, non-irrigated 310-320 parts of sand, 950-980 parts of stone, additive
10.5-11 parts.
By using above-mentioned technical proposal, the further component that concrete is arranged prepares in above-mentioned range
Concrete processing performance it is more excellent.
The present invention is further arranged to: the additive includes water-reducing agent, the 0.5- that parts by weight are respectively 10-11 parts
The air entraining agent of 1.3 parts of retarder and 0-0.2 part.
By using above-mentioned technical proposal, the selection of water-reducing agent can reduce the dosage of cement, and the addition of retarder can
Slow down the setting rate of machine-made sand concrete, the heat of hydration for releasing hydrated cementitious generation that can be more as far as possible improves Machine-made Sand
The problem of crack caused by the rapid hardening of concrete.The addition of air entraining agent can be improved the air content of concrete, improve concrete
Workability.
The present invention is further arranged to: the water-reducing agent selects high-efficiency water-reducing agent of poly-carboxylic acid.
By using above-mentioned technical proposal, polycarboxylate water-reducer has the effect of good reduction cement consumption, but real
It is larger by raw material influence of fluctuations in border, the performance of above-mentioned constituent content and material, high-performance are cooperated in present specification
Polycarboxylic acids has played bigger effect.And high performance water reducing agent of polyocarboxy acid itself and the compatibility of various cement are good, concrete
It is slump-retaining can it is good, extend the construction time of concrete.And volume is low when in use, water-reducing rate is high, and contraction is small, can
Early stage, the later strength of concrete is greatly improved, and selection high performance water reducing agent of polyocarboxy acid chloride ion content is low, alkali content
Durability that is low, being conducive to concrete.
The present invention is further arranged to: the retarder selects calcium hydroxide.
The present invention is further arranged to: further include in the component any one of sodium hydroxide or potassium hydroxide, silicon ash,
The mixture of any one of potassium silicate or sodium metasilicate and sodium metaaluminate.
The present invention is further arranged to: the parts by weight of sodium hydroxide described in component or potassium hydroxide are 1.8-3 parts；Silicon
The parts by weight of ash, potassium silicate or sodium metasilicate are 0.9-1.5 parts；The weight fraction of sodium metaaluminate is 0.2-0.3 parts.
By using above-mentioned technical proposal, sodium hydroxide or potassium hydroxide cooperate silicon ash, potassium silicate or sodium metasilicate in component
Using the activity that can excite miberal powder and flyash, improve the workability, the slump and pump-conveying property of concrete.
And in calcium hydroxide, sodium hydroxide or potassium hydroxide, when silicon ash, potassium silicate or sodium metasilicate are used cooperatively, additionally it is possible to mention
The function and effect of high slow setting, final concrete workability is good, and crack is few after the concrete construction of preparation.
Another goal of the invention of the invention is to provide a kind of preparation process of machine-made sand concrete, with what is prepared
The good advantage of concrete workability.
Foregoing invention purpose two of the invention has the technical scheme that
Including following preparation step；Step 1: stirring 20-40S after Machine-made Sand, non-irrigated sand and stone are mixed, obtain the first mixing
Object；
Step 2: stirring 30-35S in the first mixture is added in flyash, miberal powder, cement and obtains the second mixture；
Step 3: additive being added into the second concrete and water continues to stir 30-40S up to machine-made sand concrete.
By using above-mentioned technical proposal, the process through step 1- step 3 just completes the preparation of machine-made sand concrete, system
The workability of the standby concrete come out is good.
The present invention is further arranged to: be additionally added in step 2 any one of sodium hydroxide or potassium hydroxide, silicon ash,
The mixture of any one of potassium silicate or sodium metasilicate and sodium metaaluminate.
By using above-mentioned technical proposal, joined in step 2 any one of sodium hydroxide or potassium hydroxide, silicon ash,
The mixture of any one of potassium silicate or sodium metasilicate and sodium metaaluminate enhances the performance of the concrete prepared.
In conclusion advantageous effects of the invention are as follows:
1. to improve the workability of machine-made sand concrete, therefore suitable non-irrigated sand is added, improve in excessive Machine-made Sand
Influence of the presence of mountain flour to concrete performance；
2. the addition of additive further improves workability in component, the distress in concrete of preparation is few；
3. in any one of sodium hydroxide or potassium hydroxide for being further added, silicon ash, potassium silicate or sodium metasilicate
Any workability that concrete is improved with sodium metaaluminate mixture, enhances the ability of slow setting, improves concrete
Performance.
Specific embodiment
Invention is further described in detail below.
Embodiment 1
A kind of machine-made sand concrete, including water 155kg, cement 204kg, flyash 100kg, miberal powder 75kg, Machine-made Sand
520kg, non-irrigated sand 320kg, stone 970kg, water-reducing agent 10kg, retarder 1.3kg.
The preparation process of machine-made sand concrete are as follows:
Step 1: stirring 20S after Machine-made Sand, non-irrigated sand and stone are mixed, obtain the first mixture；
Step 2: stirring 35S in the first mixture is added in flyash, miberal powder, cement and obtains the second mixture；
Step 3: additive being added into the second concrete and water continues to stir 40S up to machine-made sand concrete.
The component of embodiment 2-6 is shown in Table 1.
The component proportion of the concrete of 1 embodiment 1-6 of table
| Component/kg | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Water | 155 | 155 | 160 | 160 | 165 | 165 |
| Cement | 204 | 200 | 205 | 210 | 215 | 220 |
| Flyash | 100 | 95 | 90 | 83 | 80 | 80 |
| Miberal powder | 75 | 73 | 70 | 60 | 65 | 70 |
| Machine-made Sand | 520 | 525 | 530 | 530 | 530 | 550 |
| Non-irrigated sand | 320 | 317 | 300 | 300 | 340 | 310 |
| Stone | 970 | 980 | 990 | 1000 | 950 | 950 |
| Water-reducing agent | 10 | 11 | 10 | 11 | 10 | 10 |
| Retarder | 1.3 | 0.5 | 1 | 1.3 | 0.5 | 1 |
| Air entraining agent | 0 | 0.1 | 0.2 | 0 | 0.1 | 0.2 |
2 embodiment 1-6 preparation technology parameter of table
| Step | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Step 1/s | 20 | 20 | 25 | 30 | 35 | 40 |
| Step 2/s | 35 | 35 | 32 | 32 | 30 | 30 |
| Step 3/s | 40 | 35 | 40 | 40 | 30 | 30 |
Experiment detection
1, according to specification " Standard for test methods of properties of ordinary concrete mixture standard " (GB/T50080-2016) to embodiment
The slump and divergence of machine-made sand concrete made from 1-6 are tested.
2, according to specification " standard for test methods of mechanical properties of ordinary concrete " (GB/T50081-2002) to embodiment 1-6
The compressive property of machine-made sand concrete obtained is tested.
The performance test results of concrete made from 2 embodiment 1-6 of table.
It can be derived that by the experimental result of table 2, the workability of the machine-made sand concrete of present specification is good, and joined
Air entraining agent also contributes to being promoted the compression strength of concrete.
Embodiment 7
Machine-made sand concrete includes, water 155kg, cement 204kg, flyash 100kg, miberal powder 75kg, Machine-made Sand 520kg,
Non-irrigated sand 320kg, stone 970kg, water-reducing agent 10kg, retarder 1.3kg, sodium hydroxide 1.8kg, silicon ash 0.9kg, sodium metaaluminate
0.2kg。
The preparation process of machine-made sand concrete: including following preparation step；
Step 1: stirring 20S after Machine-made Sand, non-irrigated sand and stone are mixed, obtain the first mixture；
Step 2: flyash, miberal powder, cement, sodium hydroxide, silicon ash and sodium metaaluminate being added in the first mixture and stirred
35S obtains the second mixture；
Step 3: additive being added into the second concrete and water continues to stir 40S up to machine-made sand concrete.
The component of embodiment 8-12 is shown in Table 3.
The component proportion of the concrete of 3 embodiment 7-12 of table.
| Component/kg | Embodiment 7 | Embodiment 8 | Embodiment 9 | Embodiment 10 | Embodiment 11 | Embodiment 12 |
| Water | 155 | 155 | 160 | 160 | 165 | 165 |
| Cement | 204 | 200 | 205 | 210 | 215 | 220 |
| Flyash | 100 | 95 | 90 | 83 | 80 | 80 |
| Miberal powder | 75 | 73 | 70 | 60 | 65 | 70 |
| Machine-made Sand | 520 | 525 | 530 | 530 | 530 | 550 |
| Non-irrigated sand | 320 | 317 | 300 | 300 | 340 | 310 |
| Stone | 970 | 980 | 990 | 1000 | 950 | 950 |
| Water-reducing agent | 10 | 11 | 10 | 11 | 10 | 10 |
| Retarder | 1.3 | 0.5 | 1 | 1.3 | 0.5 | 1 |
| Air entraining agent | 0 | 0.1 | 0.2 | 0 | 0.1 | 0.2 |
| Sodium hydroxide | 1.8 | - | 2 | - | 3 | - |
| Potassium hydroxide | - | 1.8 | - | 2 | - | 3 |
| Silicon ash | 0.9 | - | - | 1.1 | - | - |
| Potassium silicate | - | 0.9 | - | - | 1.2 | - |
| Sodium metasilicate | - | - | 1 | - | 1.3 | |
| Sodium metaaluminate | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 |
4 embodiment 7-12 preparation technology parameter of table
| Step | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Step 1/s | 20 | 20 | 25 | 30 | 35 | 40 |
| Step 2/s | 35 | 35 | 32 | 32 | 30 | 30 |
| Step 3/s | 40 | 35 | 40 | 40 | 30 | 30 |
Experiment detection
According to embodiment 1-6 preparation concrete experiment detection method detected,
The performance test results of concrete made from 6 embodiment 7-12 of table.
It can be derived that by the experimental result of table 6, the sodium hydroxide or potassium hydroxide being added in present specification；Silicon ash, silicon
Sour potassium or sodium metasilicate；The addition of sodium metaaluminate can significantly enhance the performance of concrete.
Comparative example
Comparative example 1
Comparative example 1 contains 750 parts of non-irrigated sand the difference from embodiment 1 is that without Machine-made Sand in component.
Comparative example 2
Comparative example 2 is the difference from embodiment 1 is that without Machine-made Sand and the air entraining agent containing 0.1kg and 750 parts in component
Non-irrigated sand.
Comparative example 3
The difference of comparative example 3 and embodiment 7 is in component to contain 750 parts of non-irrigated sand without containing Machine-made Sand.
Comparative example 4
The difference of comparative example 4 and embodiment 8 is in component without Machine-made Sand and the air entraining agent containing 0.1kg and 750 parts
Non-irrigated sand.
The data for analyzing comparative example 1 and embodiment 1, without containing Machine-made Sand and all using concrete when non-irrigated sand in component
Workability is almost the same compared with Example 1, then illustrates that the use of Machine-made Sand in present specification cooperates non-irrigated sand use can
Improve the workability of concrete and the intensity of concrete can also be enhanced.
The data for analyzing comparative example 2 and embodiment 1, when being free of Machine-made Sand in component and all using non-irrigated sand, concrete
Workability is almost the same compared with Example 1, while the experimental result of comparative example 1, comparative example 1 and comparative example 2, is being added
The intensity of concrete is also improved after air entraining agent, then illustrate air entraining agent be added can workability to concrete it is further
Have an impact, enhance the intensity of concrete.
The experimental data of comparative example 3 and embodiment 7, the Machine-made Sand in component are analyzed, but contains non-irrigated sand and sodium hydroxide
Or potassium hydroxide；Silicon ash, potassium silicate or sodium metasilicate；The addition of sodium metaaluminate can significantly enhance the performance of concrete.
Comparative example 1,2,3 and 4 is further analyzed, air entraining agent and sodium hydroxide or potassium hydroxide is added in component；Silicon ash, silicon
Sour potassium or sodium metasilicate；Influence of the addition of sodium metaaluminate to concrete strength is more significant.
The selection of component in present specification: cement belongs to normal silicate PO42.5 cement；Flyash selects I grade of powder
Coal ash；Slag powders select S95 grade slag powder.Stone is 5-25mm continuous grading rubble；Water-reducing agent agent selects polyocarboxy acid type efficient
Water-reducing agent.Polycarboxylic type high performance water reducer is purchased from Shaanxi BoHai Chemical Engineering Co., Ltd；Retarder selects calcium hydroxide；Air entraining agent is adopted
JC-14 concrete air-entrainer purchased from Shaanxi absolute sincerity building materials Co., Ltd.And wherein the purity of sodium hydroxide is >=99%,
The purity of potassium hydroxide is 99.5%.Sodium metasilicate is 3.3 moulds.Potassium silicate is 3.3 moulds.Silicon ash is commercially available common silicon ash.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of machine-made sand concrete, it is characterised in that: the component including following parts by weight, 155-165 parts of water, cement 200-
220 parts, 80-100 parts of flyash, 60-80 parts of miberal powder, 520-550 parts of Machine-made Sand, non-irrigated 300-340 parts of sand, stone 950-1000
Part, 10.5-11.5 parts of additive.
2. machine-made sand concrete according to claim 1, it is characterised in that: the component including following parts by weight, water
155-160 parts, 200-210 parts of cement, 90-95 parts of flyash, 70-75 parts of miberal powder, 530-540 parts of Machine-made Sand, non-irrigated sand 310-320
Part, 950-980 parts of stone, 10.5-11 parts of additive.
3. machine-made sand concrete according to claim 1 or 2, it is characterised in that: the additive includes parts by weight point
Not Wei 10-11 parts of water-reducing agent and 0.5-1.3 parts of retarder and 0-0.2 part air entraining agent.
4. machine-made sand concrete according to claim 1 or 2, it is characterised in that: the water-reducing agent selection polycarboxylic acids is efficient
Water-reducing agent.
5. machine-made sand concrete according to claim 1 or 2, it is characterised in that: the retarder selects calcium hydroxide.
6. machine-made sand concrete according to claim 1 or 2, it is characterised in that: further include sodium hydroxide in the component
Or the mixture of any one of any one of potassium hydroxide, silicon ash, potassium silicate or sodium metasilicate and sodium metaaluminate.
7. machine-made sand concrete according to claim 6, it is characterised in that: sodium hydroxide described in component or potassium hydroxide
Parts by weight be 1.8-3 parts；The parts by weight of silicon ash, potassium silicate or sodium metasilicate are 0.9-1.5 parts；The weight of sodium metaaluminate point
Number is 0.2-0.3 parts.
8. a kind of preparation process of machine-made sand concrete as claimed in claim 1 or 2, which is characterized in that including preparing as follows
Step；Step 1: stirring 20-40S after Machine-made Sand, non-irrigated sand and stone are mixed, obtain the first mixture；
Step 2: stirring 30-35S in the first mixture is added in flyash, miberal powder, cement and obtains the second mixture；
Step 3: additive being added into the second concrete and water continues to stir 30-40S up to machine-made sand concrete.
9. the preparation process of machine-made sand concrete according to claim 8, which is characterized in that be additionally added hydrogen in step 2
The mixture of any one of any one of sodium oxide molybdena or potassium hydroxide, silicon ash, potassium silicate or sodium metasilicate with sodium metaaluminate.
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Application publication date: 20191122 |