CN104129960A - Polypropylene fiber coral concrete and preparation method thereof - Google Patents
Polypropylene fiber coral concrete and preparation method thereof Download PDFInfo
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- CN104129960A CN104129960A CN201410388707.4A CN201410388707A CN104129960A CN 104129960 A CN104129960 A CN 104129960A CN 201410388707 A CN201410388707 A CN 201410388707A CN 104129960 A CN104129960 A CN 104129960A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses polypropylene fiber coral concrete and a preparation method thereof. The concrete is composed of coral concrete and polypropylene fibers, wherein the coral concrete is in C30 grade and comprises the following components per cubic meter: 405kg of cement, 45kg of coal ash, 830kg of medium sand, 716kg of coral, 180kg of seawater and 4.5kg of water reducing agent; the polypropylene fibers are unifilar bunchy short fibers and respectively 19mm in length; the tensile strength of the polypropylene fibers is greater than 500MPa. The preparation method comprises the following steps: pouring the sand and the coral into a stirrer for stirring; adding the polypropylene fibers and performing dry stirring evenly; then adding one half of seawater and stirring; and finally, adding the cement, the coal ash, the water reducing agent and the rest of seawater and evenly stirring so as to obtain the polypropylene fiber coral concrete. The polypropylene fiber coral concrete is excellent in splitting tensile strength and rupture strength, and is good in toughness, crack resistance and permeability resistance at the same time. In addition, the polypropylene fiber coral concrete has the advantages of light weight, low cost and the like, and can be prepared by utilizing local materials. Thus, the maintenance of maritime rights and interests and the development and the utilization of marine resources are facilitated. As a result, the polypropylene fiber coral concrete accords with requirements of the maritime strategy in China.
Description
Technical field
The invention belongs to architecture engineering material technical field, particularly a kind of polypropylene fibre coral concrete and preparation method thereof.
Background technology
Contention along with ocean exploitation and maritime rights and interests, the oceanographic engineering construction that comprises military protection day by day increases, for the islands and reefs engineering construction away from continent, do not destroying under the prerequisite of local environment, based on karang, replace coarse aggregate, seawater replaces the formulated coral concrete of fresh water to be of great immediate significance in civil engineering work and military engineering.It is lighter that coral concrete and normal concrete are compared deadweight, also there is impervious resistance and split the advantages such as ability is strong, heat insulation and preservation effect good, freeze-thaw-anti-fatigue ability strong, good endurance, but it has the essence shortcomings such as folding strength is low, Young's modulus is little, easy to crack, chloride content is high simultaneously, and its development and application is restricted.Therefore, select high fiber strength strains and coral concrete to carry out the compound fiber reinforcement coral concrete of making, can effectively overcome itself shortcoming, improve its basic mechanical performance, further expand its Application Areas.
Polypropylene fibre is that fiber is split in the resistance of a kind of new-type concrete, is often known as " less important stiffening web ", bears the tensile stress causing because of plastic shrinkage, constraint with stop the expansion of microfracture and delay the appearance in new crack.The features such as polypropylene fibre also has good stable chemical performance in addition, cheap, deadweight is less, easy construction.The coral concrete that adopts polypropylene fibre to make has high-strength light, the advantage of resistance to cleavage, anti-permeability performance and excellent in durability.
Adopt the pattern of coral aggregate, fiber and cement slurry interfacial transition zone microtexture in scanning electron microscopic observation polypropylene fibre coral concrete.Result shows, polypropylene fibre has strengthened the cohesive force of aggregate and cement slurry interfacial transition zone, and mixing flyash makes interfacial transition zone aggregate and slurry be overlapped closely by a large amount of hydrated calcium silicate gels, strengthened coral aggregate and cement slurry cohesive strength, made polypropylene fibre split the better of effect performance to the enhancing of coral concrete, toughness reinforcing, resistance.
Summary of the invention
The object of this invention is to provide a kind of polypropylene fibre coral concrete and preparation method thereof.
Technical scheme of the present invention:
A polypropylene fibre coral concrete, is comprised of coral concrete and polypropylene fibre, and the volume percent content of two kinds of components is: 99.78% coral concrete and 0.22% polypropylene fibre.
Described coral concrete is the coral concrete of C30 grade, and its component of every cubic metre is: 405 kilograms of cement, 45 kilograms of flyash, 830 kilograms of medium sands, 716 kilograms of corals, 180 kilograms of seawater and 4.5 kilograms of water reducers; Wherein: cement is the ordinary Portland cement of label 42.5; Flyash is II level flyash, and its specific surface area is 418m
2/ kg, loss on ignition is 3.5%, water requirement is 93%; Medium sand be natural in thick river sand; Coral is the coral sand distributing on Weizhou Island, Beihai City, and it is shaped as strip and bulk, long 2 ~ 4 centimetres of strip coral sand, diameter is 1.5 ± 0.02 centimetres, block coral sand length and width are 2 ~ 3 centimetres, and diameter is 1.5 ± 0.02 centimetres, and strip coral sand accounts for 25.7% of coral sand gross weight; Seawater is formulated with sea salt according to South China Sea composition; Water reducer is polycarboxylate high performance water-reducing agent.
Described polypropylene fibre is monofilament pencil staple fibre, and its length is 19 millimeters, and tensile strength is greater than 500 MPas.
The preparation method of above-mentioned polypropylene fibre coral concrete, concrete steps are:
(1) according to said components, require to take all raw materials, standby.
(2) coral that step (1) taken cleans to be put into the seawater that step (1) takes after airing and soaks 1 hour.
(3) medium sand that the coral after step (2) is soaked and step (1) take is put stirrer dry mixing into, is sprinkled into uniformly the polypropylene fibre that step (1) takes simultaneously, and dry mixing is even.
(4) seawater taking in step (1) is left to half, in the remaining product that all adds step (3) dry mixing gained, stir after 1 minute, the cement, flyash, water reducer and the residual seawater that add step (1) to take, stir and make polypropylene fibre coral concrete after 2 minutes.
Compared with prior art, the present invention has following beneficial effect: the present invention adds polypropylene fibre to be slightly improved the ultimate compression strength of coral concrete and tensile splitting strength, the folding strength of coral concrete is improved obviously, improved toughness, splitting resistance and the impermeability of coral concrete simultaneously; And the flyash mixing can significantly improve the mobility of newly mixing polypropylene fibre coral concrete, glutinous poly-property and water-retentivity; The invention solves islands and reefs engineering materials and transport inconvenient problem, can greatly reduce production, transportation cost, shorten the completion time of project, be conducive to protection and the development and utilization of marine resources of maritime rights and interests, meet the requirement of national marine strategy.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples contribute to those skilled in the art further to understand the present invention, but do not limit in any form the present invention.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
embodiment:
A polypropylene fibre coral concrete, is comprised of coral concrete and polypropylene fibre, and the volume percent content of two kinds of components is: 99.78% coral concrete and 0.22% polypropylene fibre.
Described coral concrete is the coral concrete of C30 grade, and its component of every cubic metre is: 405 kilograms of cement, 45 kilograms of flyash, 830 kilograms of medium sands, 716 kilograms of corals, 180 kilograms of seawater and 4.5 kilograms of water reducers; Wherein: cement is the ordinary Portland cement of label 42.5; Flyash is II level flyash, and its table specific area is 418m
2/ kg, loss on ignition is 3.5%, water requirement is 93%; Medium sand be natural in thick river sand; Coral is the coral sand distributing on Weizhou Island, Beihai City, and it is shaped as strip and bulk, long 2 ~ 4 centimetres of strip coral sand, diameter is 1.5 ± 0.02 centimetres, block coral sand length and width are 2 ~ 3 centimetres, and diameter is 1.5 ± 0.02 centimetres, and strip coral sand accounts for 25.7% of coral sand gross weight; Seawater is formulated with sea salt according to South China Sea composition; Water reducer is polycarboxylate high performance water-reducing agent.
Described polypropylene fibre is the monofilament pencil staple fibre of 19 millimeters of length, and tensile strength is 550 MPas, and quality is 2 kilograms.
The preparation method of above-mentioned polypropylene fibre coral concrete, concrete steps are:
(1) according to said components, require to take all raw materials, standby.
(2) coral that step (1) taken cleans to be put into the seawater that step (1) takes after airing and soaks 1 hour.
(3) medium sand that the coral after step (2) is soaked and step (1) take is put stirrer dry mixing into, is sprinkled into uniformly the polypropylene fibre that step (1) takes simultaneously, and dry mixing is even.
(4) seawater taking in step (1) is left to half, in the remaining product that all adds step (3) dry mixing gained, stir after 1 minute, the cement, flyash, water reducer and the residual seawater that add step (1) to take, stir and make polypropylene fibre coral concrete after 2 minutes.
The unit weight of polypropylene fibre coral concrete prepared by the present embodiment is 2182.5kg/m
3; After 28 days, the polypropylene fibre coral concrete of the present embodiment and the coral concrete comparison of identical proportioning, ultimate compression strength promotes 4.7%; With the coral concrete comparison of identical proportioning, tensile splitting strength promotes 14.7%; With the coral concrete comparison of identical proportioning, folding strength promotes 66.7%.
Claims (2)
1. a polypropylene fibre coral concrete, is characterized in that this polypropylene fibre coral concrete is comprised of coral concrete and polypropylene fibre, and the volume percent content of two kinds of components is: 99.78% coral concrete and 0.22% polypropylene fibre;
Described coral concrete is the coral concrete of C30 grade, and its component of every cubic metre is: 405 kilograms of cement, 45 kilograms of flyash, 830 kilograms of medium sands, 716 kilograms of corals, 180 kilograms of seawater and 4.5 kilograms of water reducers; Wherein: cement is the ordinary Portland cement of label 42.5; Flyash is II level flyash, and its specific surface area is 418m
2/ kg, loss on ignition is 3.5%, water requirement is 93%; Medium sand be natural in thick river sand; Coral is the coral sand distributing on Weizhou Island, Beihai City, and it is shaped as strip and bulk, long 2 ~ 4 centimetres of strip coral sand, diameter is 1.5 ± 0.02 centimetres, block coral sand length and width are 2 ~ 3 centimetres, and diameter is 1.5 ± 0.02 centimetres, and strip coral sand accounts for 25.7% of coral sand gross weight; Seawater is formulated with sea salt according to South China Sea composition; Water reducer is polycarboxylate high performance water-reducing agent;
Described polypropylene fibre is monofilament pencil staple fibre, and its length is 19 millimeters, and tensile strength is greater than 500 MPas.
2. a preparation method for polypropylene fibre coral concrete as claimed in claim 1, is characterized in that concrete steps are:
(1) according to the component of claim 1, require to take all raw materials, standby;
(2) coral that step (1) taken cleans to be put into the seawater that step (1) takes after airing and soaks 1 hour;
(3) medium sand that the coral after step (2) is soaked and step (1) take is put stirrer dry mixing into, is sprinkled into uniformly the polypropylene fibre that step (1) takes simultaneously, and dry mixing is even;
(4) seawater taking in step (1) is left to half, in the remaining product that all adds step (3) dry mixing gained, stir after 1 minute, the cement, flyash, water reducer and the residual seawater that add step (1) to take, stir and make polypropylene fibre coral concrete after 2 minutes.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609806A (en) * | 2015-01-27 | 2015-05-13 | 中国人民解放军总后勤部建筑工程研究所 | Seawater coral sand artificial aggregate concrete block and preparation method thereof |
| CN105837142A (en) * | 2016-04-21 | 2016-08-10 | 武汉理工大学 | Micro-expansive coral sand concrete and preparation method thereof |
| CN105936593A (en) * | 2016-04-28 | 2016-09-14 | 中冶建筑研究总院有限公司 | Seawater coral aggregate concrete |
| CN106047366A (en) * | 2016-06-20 | 2016-10-26 | 方祥位 | Method for improving microorganism solidified coral sand by use of polypropylene fibers |
| CN106149872A (en) * | 2016-07-05 | 2016-11-23 | 中国京冶工程技术有限公司 | A kind of advanced composite material (ACM) and coral concrete structural system and construction method thereof |
| CN107986650A (en) * | 2017-11-30 | 2018-05-04 | 嘉华特种水泥股份有限公司 | A kind of concrete gel material |
| CN108083738A (en) * | 2018-01-24 | 2018-05-29 | 中国科学院武汉岩土力学研究所 | Full coral aggregate concrete of polypropylene fibre and preparation method thereof |
| CN109020363A (en) * | 2018-07-31 | 2018-12-18 | 中交第二航务工程局有限公司 | Utilize the Reactive Powder Concrete and preparation method thereof of coral reef sand preparation |
| CN109665789A (en) * | 2019-01-22 | 2019-04-23 | 广西大学 | A kind of glass fibre coral marine sand concrete and preparation method thereof |
| CN110790550A (en) * | 2019-11-20 | 2020-02-14 | 佛山科学技术学院 | Stone waste residue powder fiber mortar and preparation method thereof |
| WO2021012937A1 (en) * | 2019-07-24 | 2021-01-28 | 桂林理工大学 | High-strength coral concrete and preparation method therefor |
| CN115417647A (en) * | 2022-09-29 | 2022-12-02 | 江苏科技大学 | Styrene-acrylic emulsion modified coral concrete and preparation method thereof |
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| CN1087886A (en) * | 1992-12-10 | 1994-06-15 | 中国人民解放军海军工程设计研究局 | Coral concrete and compound method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609806A (en) * | 2015-01-27 | 2015-05-13 | 中国人民解放军总后勤部建筑工程研究所 | Seawater coral sand artificial aggregate concrete block and preparation method thereof |
| CN105837142A (en) * | 2016-04-21 | 2016-08-10 | 武汉理工大学 | Micro-expansive coral sand concrete and preparation method thereof |
| CN105936593A (en) * | 2016-04-28 | 2016-09-14 | 中冶建筑研究总院有限公司 | Seawater coral aggregate concrete |
| CN106047366A (en) * | 2016-06-20 | 2016-10-26 | 方祥位 | Method for improving microorganism solidified coral sand by use of polypropylene fibers |
| CN106149872A (en) * | 2016-07-05 | 2016-11-23 | 中国京冶工程技术有限公司 | A kind of advanced composite material (ACM) and coral concrete structural system and construction method thereof |
| CN107986650A (en) * | 2017-11-30 | 2018-05-04 | 嘉华特种水泥股份有限公司 | A kind of concrete gel material |
| CN108083738A (en) * | 2018-01-24 | 2018-05-29 | 中国科学院武汉岩土力学研究所 | Full coral aggregate concrete of polypropylene fibre and preparation method thereof |
| CN109020363A (en) * | 2018-07-31 | 2018-12-18 | 中交第二航务工程局有限公司 | Utilize the Reactive Powder Concrete and preparation method thereof of coral reef sand preparation |
| CN109020363B (en) * | 2018-07-31 | 2021-02-26 | 中交第二航务工程局有限公司 | Active powder concrete prepared from coral reef sand and preparation method thereof |
| CN109665789A (en) * | 2019-01-22 | 2019-04-23 | 广西大学 | A kind of glass fibre coral marine sand concrete and preparation method thereof |
| CN109665789B (en) * | 2019-01-22 | 2021-03-30 | 广西大学 | Glass fiber coral sea sand concrete and preparation method thereof |
| WO2021012937A1 (en) * | 2019-07-24 | 2021-01-28 | 桂林理工大学 | High-strength coral concrete and preparation method therefor |
| CN110790550A (en) * | 2019-11-20 | 2020-02-14 | 佛山科学技术学院 | Stone waste residue powder fiber mortar and preparation method thereof |
| CN110790550B (en) * | 2019-11-20 | 2022-02-01 | 佛山科学技术学院 | Stone waste residue powder fiber mortar and preparation method thereof |
| CN115417647A (en) * | 2022-09-29 | 2022-12-02 | 江苏科技大学 | Styrene-acrylic emulsion modified coral concrete and preparation method thereof |
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| CN104129960B (en) | 2016-04-06 |
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Application publication date: 20141105 Assignee: Guangxi Times Style Tourism Planning Investment Management Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000056 Denomination of invention: Polypropylene fiber coral concrete and its preparation method Granted publication date: 20160406 License type: Common License Record date: 20221118 |
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