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Reactive powder concrete doped with granite powder and preparation method thereof

A technology of granite stone powder and active powder, applied in the field of building materials, can solve problems such as increasing the cost of active powder concrete, achieve good economic and social benefits, reduce pollution, and save resources.

Inactive Publication Date: 2016-01-13
建发合诚工程咨询股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The reactive powder concrete prepared by the above two patents has a compressive strength of 260-300 MPa under normal pressure and heat curing conditions, but new admixtures - super-active slag powder and ultra-fine ordinary glass are introduced into the mix ratio powder, increasing the cost of reactive powder concrete

Method used

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  • Reactive powder concrete doped with granite powder and preparation method thereof
  • Reactive powder concrete doped with granite powder and preparation method thereof
  • Reactive powder concrete doped with granite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The active powder concrete prepared by using the standard mix ratio is shown in Table 5.

[0049] Table 5 active powder concrete mix ratio

[0050]

[0051] The water-binder ratio is 0.16; the sand-binder ratio is 0.9; the amount of water reducer is 2.5% of the cement;

[0052]The preparation method is: weigh cement, silica fume, and river sand according to the mixing ratio, pour them into the mixer, and dry mix for 3 minutes; add half of the water dissolved in the water reducing agent, and stir for 2 minutes; finally add the other half of the water reducing agent dissolved water, stirring for 2-3min; the measured fluidity is 126mm; pour the mixture into a 40mm×40mm×160mm triple mold, and vibrate on a vibrating table for 4min. After the test piece was prepared and left to stand for 24 hours, the formwork was removed, and after the formwork was removed, it was transferred to an autoclave for autoclave curing. The autoclaved curing system is as follows: evacuate for ...

Embodiment 2

[0054] Granite powder was used to replace 5% of cementitious materials (cement and silica fume) to prepare reactive powder concrete, and the mix ratio is shown in Table 6.

[0055] Table 6 Active powder concrete mix ratio

[0056]

[0057] The water-binder ratio is 0.16; the sand-binder ratio is 0.9; the amount of water reducer is 2.5% of the cement;

[0058] The preparation method is as follows: weigh cement, silica fume, river sand and granite stone powder according to the mixing ratio, pour them into the mixer, and dry mix for 3 minutes; add half of the water dissolved in the water reducing agent, and stir for 2 minutes; finally add the dissolved water reducing agent The other half of the water was stirred for 2-3 minutes; the measured fluidity was 121mm; the mixture was poured into a 40mm×40mm×160mm triple mold and vibrated on a vibrating table for 4 minutes. After the test piece was prepared and left to stand for 24 hours, the formwork was removed, and after the formw...

Embodiment 3

[0060] Granite powder was used to replace 10% of the cementitious materials (cement and silica fume) to prepare active powder concrete, and the mix ratio was shown in Table 7.

[0061] Table 7 Active powder concrete mix ratio

[0062]

[0063] The water-binder ratio is 0.16; the sand-binder ratio is 0.9; the amount of water reducer is 2.5% of the cement;

[0064] The preparation method is as follows: weigh cement, silica fume, river sand and granite stone powder according to the mixing ratio, pour them into the mixer, and dry mix for 3 minutes; add half of the water dissolved in the water reducing agent, and stir for 2 minutes; finally add the dissolved water reducing agent The other half of the water was stirred for 2-3 minutes; the measured fluidity was 109mm; the mixture was poured into a 40mm×40mm×160mm triple mold and vibrated on a vibrating table for 4 minutes. After the test piece was prepared and left to stand for 24 hours, the formwork was removed, and after the f...

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Abstract

The invention provides a reactive powder concrete doped with granite powder and a preparation method thereof, belonging to building materials. The reactive powder concrete doped with the granite powder is prepared from raw materials of cement, silicon ash, a water reducing agent, river sand, water and the granite powder. The method comprises the following steps: uniformly spreading the granite powder in a tray, then placing the tray in an oven and carrying out drying and sieving, and removing impurities in the granite powder; cleaning a test mold, removing debris inside the test mold, coating the inner surface of the test mold with a layer of machine oil and a layer of a mold release agent; pouring the cement, the silicon ash, the river sand and the granite powder into a mixer, and carrying out dry mixing; then adding the water dissolved with the water reducing agent, and carrying out stirring; pouring the obtained product in the test mold, then placing the test mold on a vibrating table, carrying out vibration until the surface of the test mold emerges slurry, then carrying out stopping, and cutting excess concrete with a spatula until the surface of the test mold is smoothed; and carrying out standing and demolding, then transferring a demolded test specimen into an autoclave and carrying out autoclave curing, and after autoclave curing is completed, carrying out transferring into a standard curing room and carrying out curing until a specified age of concrete is achieved so as to obtain the reactive powder concrete doped with the granite powder.

Description

technical field [0001] The invention belongs to the technical field of building materials and relates to concrete, in particular to an active powder concrete mixed with granite stone powder and a preparation method thereof. Background technique [0002] Reactive Powder Concrete (RPC for short) is a cement-based composite material with ultra-high strength, high toughness, strong durability and good volume stability. The raw material of RPC is mainly composed of mineral materials with fine particles and certain activity. In RPC, the active components mainly include silica fume and quartz powder, and the content of silica fume and quartz powder is relatively high. In addition, the content of cement in RPC is very high, which makes the preparation cost and energy consumption of RPC high. . Due to its high preparation cost, research at home and abroad mainly uses steel slag powder, ultrafine fly ash, ultrafine slag, rice husk ash and other waste materials to replace part of cem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B14/06
Inventor 黄乙纯程棋锋刘德全陈天培康明旭沈志献吴建刘向东
Owner 建发合诚工程咨询股份有限公司
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