CN104129960B - A kind of polypropylene fibre coral concrete and preparation method thereof - Google Patents
A kind of polypropylene fibre coral concrete and preparation method thereof Download PDFInfo
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- CN104129960B CN104129960B CN201410388707.4A CN201410388707A CN104129960B CN 104129960 B CN104129960 B CN 104129960B CN 201410388707 A CN201410388707 A CN 201410388707A CN 104129960 B CN104129960 B CN 104129960B
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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 a kind of polypropylene fibre coral concrete and preparation method thereof.This concrete is made up of coral concrete and polypropylene fibre; 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; Polypropylene fibre is monofilament pencil staple fibre, and its length is 19 millimeters, and tensile strength is greater than 500 MPas.Pour in stirrer by sand and coral, stir, add polypropylene fibre, dry mixing is even, then adds 1/2 seawater stirring, finally adds cement, flyash, water reducer and residual seawater, namely obtains polypropylene fibre coral concrete after stirring.Polypropylene fibre coral concrete of the present invention has good tensile splitting strength and folding strength; there is good toughness, splitting resistance and impermeability simultaneously; and have advantages such as gathering materials on the spot, lightweight, cost are low concurrently; be conducive to protection and the development and utilization of marine resources of maritime rights and interests, meet the requirement of national marine strategy.
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
Along with the contention of ocean exploitation and maritime rights and interests, the oceanographic engineering construction comprising military protection day by day increases, for the islands and reefs engineering construction away from continent, under the prerequisite not destroying local environment, replace coarse aggregate based on karang, seawater replaces the formulated coral concrete of fresh water to be of great immediate significance in civil engineering work and military engineering.Coral concrete deadweight compared with normal concrete is lighter, 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, makes its development and application be restricted simultaneously.Therefore, select high fiber strength strains and coral concrete to carry out compound and make fiber reinforcement coral concrete, effectively can overcome the shortcoming of itself, improve its basic mechanical performance, expand its Application Areas further.
Polypropylene fibre is that fiber is split in the resistance of a kind of new-type concrete, is often referred to as " secondary stiffening web ", bears the tensile stress because plastic shrinkage causes, 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 adopting 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 makes the cohesive force of aggregate and cement slurry interfacial transition zone enhance, and mixing flyash makes interfacial transition zone aggregate and slurry be overlapped closely by a large amount of hydrated calcium silicate gels, enhance coral aggregate and cement slurry cohesive strength, make polypropylene fibre to the enhancing of coral concrete, toughness reinforcing, resistance split that effect plays better.
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 kind of polypropylene fibre coral concrete, be made up of coral concrete and polypropylene fibre, the volume percent content of two kinds of components is: the coral concrete of 99.78% and the polypropylene fibre of 0.22%.
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 grade of flyash, and its specific surface area is 418m
2/ kg, loss on ignition is 3.5%, and water requirement is 93%; Medium sand be natural in thick river sand; Coral is the coral sand that Weizhou Island, Beihai City distributes, and its shape is 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 according to South China Sea composition sea salt; 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) require to take all raw materials according to said components, for subsequent use.
(2) put into the seawater that step (1) takes after coral cleaning airing step (1) taken to soak 1 hour.
(3) medium sand that the coral after step (2) being soaked and step (1) take puts stirrer dry mixing into, and be sprinkled into the polypropylene fibre that step (1) takes uniformly, dry mixing is even simultaneously.
(4) seawater taken in step (1) is left half, remainingly all add in the product of step (3) dry mixing gained, stir after 1 minute, add cement, flyash, water reducer and residual seawater that step (1) takes, stir after 2 minutes and namely obtain polypropylene fibre coral concrete.
Compared with prior art, the present invention has following beneficial effect: the present invention adds polypropylene fibre and slightly improves the ultimate compression strength of coral concrete and tensile splitting strength, the folding strength of coral concrete is improved obviously, improves the toughness of coral concrete, splitting resistance and impermeability simultaneously; And the flyash mixed significantly can improve the mobility of newly mixing polypropylene fibre coral concrete, glutinous poly-property and water-retentivity; The invention solves the problem of islands and reefs engineering materials transport inconvenience, 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 and understand the present invention further, but do not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
embodiment:
A kind of polypropylene fibre coral concrete, be made up of coral concrete and polypropylene fibre, the volume percent content of two kinds of components is: the coral concrete of 99.78% and the polypropylene fibre of 0.22%.
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 grade of flyash, and its table specific area is 418m
2/ kg, loss on ignition is 3.5%, and water requirement is 93%; Medium sand be natural in thick river sand; Coral is the coral sand that Weizhou Island, Beihai City distributes, and its shape is 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 according to South China Sea composition sea salt; Water reducer is polycarboxylate high performance water-reducing agent.
Described polypropylene fibre is the monofilament pencil staple fibre of length 19 millimeters, 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) require to take all raw materials according to said components, for subsequent use.
(2) put into the seawater that step (1) takes after coral cleaning airing step (1) taken to soak 1 hour.
(3) medium sand that the coral after step (2) being soaked and step (1) take puts stirrer dry mixing into, and be sprinkled into the polypropylene fibre that step (1) takes uniformly, dry mixing is even simultaneously.
(4) seawater taken in step (1) is left half, remainingly all add in the product of step (3) dry mixing gained, stir after 1 minute, add cement, flyash, water reducer and residual seawater that step (1) takes, stir after 2 minutes and namely obtain polypropylene fibre coral concrete.
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 compares with the coral concrete of identical proportioning, and ultimate compression strength promotes 4.7%; Compare with the coral concrete of identical proportioning, tensile splitting strength promotes 14.7%; Compare with the coral concrete of identical proportioning, folding strength promotes 66.7%.
Claims (2)
1. a polypropylene fibre coral concrete, it is characterized in that this polypropylene fibre coral concrete is made up of coral concrete and polypropylene fibre, the volume percent content of two kinds of components is: the coral concrete of 99.78% and the polypropylene fibre of 0.22%;
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 grade of flyash, and its specific surface area is 418m
2/ kg, loss on ignition is 3.5%, and water requirement is 93%; Medium sand be natural in thick river sand; Coral is the coral sand that Weizhou Island, Beihai City distributes, and its shape is 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 according to South China Sea composition sea salt; 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) all raw materials are taken according to the component requirements of claim 1, for subsequent use;
(2) put into the seawater that step (1) takes after coral cleaning airing step (1) taken to soak 1 hour;
(3) medium sand that the coral after step (2) being soaked and step (1) take puts stirrer dry mixing into, and be sprinkled into the polypropylene fibre that step (1) takes uniformly, dry mixing is even simultaneously;
(4) seawater taken in step (1) is left half, remainingly all add in the product of step (3) dry mixing gained, stir after 1 minute, add cement, flyash, water reducer and residual seawater that step (1) takes, stir after 2 minutes and namely obtain polypropylene fibre coral concrete.
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104609806B (en) * | 2015-01-27 | 2017-01-04 | 中国人民解放军总后勤部建筑工程研究所 | A kind of sea water mixes foster coral sand artificial aggregate's concrete segment and preparation method thereof |
| CN105837142B (en) * | 2016-04-21 | 2018-01-12 | 武汉理工大学 | A kind of microdilatancy type coral sand concrete and preparation method thereof |
| CN105936593B (en) * | 2016-04-28 | 2018-03-20 | 中冶建筑研究总院有限公司 | A kind of 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 |
| CN107986650B (en) * | 2017-11-30 | 2021-06-11 | 嘉华特种水泥股份有限公司 | Concrete cementing 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 |
| 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 |
| CN109665789B (en) * | 2019-01-22 | 2021-03-30 | 广西大学 | Glass fiber coral sea sand concrete and preparation method thereof |
| CN110372298B (en) * | 2019-07-24 | 2021-11-16 | 桂林理工大学 | Preparation method of high-strength coral concrete |
| 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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| CN102808480A (en) * | 2012-08-03 | 2012-12-05 | 哈尔滨工业大学深圳研究生院 | Steel-tube coral concrete member |
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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 |
| CN102808480A (en) * | 2012-08-03 | 2012-12-05 | 哈尔滨工业大学深圳研究生院 | Steel-tube coral concrete member |
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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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