A kind of active powder concrete and its preparation method and application

A technology of active powder and concrete, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor strength growth, easy pulling out of steel fibers, micro-cracks on the interface, etc. strength, improve strength, improve the effect of concrete interface

Active Publication Date: 2018-12-14
重庆天维绿色建筑技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of active powder concrete and its preparation method and application, for improving the active powder concrete steel fiber in the prior art is easy to pull out, fracture energy is low, strength Poor growth, interface microcracks, lattice defects, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of active powder concrete, comprises the raw material of following weight part:

[0039] 460 parts of cement, 450 parts of modified superfine powder, 128 parts of modified steel fiber, 1180 parts of quartz sand, 180 parts of quartz powder, 23 parts of admixture, and 167 parts of water.

[0040] The raw material and weight ratio of the modified steel fiber is copper-plated steel fiber: aminopropyltriethoxysilane coupling agent diluent = 10:0.3, the diameter of the steel fiber is 0.1-0.25mm, the length is 12-15mm, the modified The raw material and weight ratio of the superfine powder are slag powder: silicon micropowder: calcium sulfate whisker: aminopropyltriethoxysilane coupling agent diluent = 10:10:2.5:0.4. The cement is ordinary Portland 52.5 grade cement (conforming to "GB175-2007 General Portland Cement"); the slag powder is S95 grade (conforming to "GB / T18046-2008 Granulated blast furnace slag powder used in cement and concrete") ; The admixture is polycar...

Embodiment 2

[0052] A kind of active powder concrete, comprises the raw material of following weight part:

[0053] 480 parts of cement, 400 parts of modified superfine powder, 156 parts of modified steel fiber, 1150 parts of quartz sand, 200 parts of quartz powder, 22 parts of admixture, and 170 parts of water.

[0054] The raw material and weight ratio of modified steel fiber are stainless steel fiber: glycidyl etheroxypropyl trimethoxysilane diluent = 10:0.25, steel fiber diameter is 0.1-0.25mm, length is 12-15mm; modified superfine powder The raw material and weight ratio are slag powder: silicon micropowder: calcium sulfate whisker: aminopropyltriethoxysilane coupling agent diluent = 10:20:3:0.5. The cement is a mixture of ordinary Portland 42.5 cement and 52.5 cement (in accordance with "GB175-2007 General Portland Cement"); blast furnace slag powder "); the admixture is polycarboxylate superplasticizer (water reducing rate ≥ 30%, in line with "JG / T 223-2007 polycarboxylate high-per...

Embodiment 3

[0066] A kind of active powder concrete, comprises the raw material of following weight part:

[0067] 450 parts of cement, 400 parts of modified superfine powder, 165 parts of modified steel fiber, 1160 parts of quartz sand, 220 parts of quartz powder, 30 parts of admixture, and 165 parts of water.

[0068] The raw material and weight ratio of the modified steel fiber is a mixture of copper-plated steel fiber and stainless steel fiber: mercaptopropyltriethoxysilane dilution = 10:0.3, the diameter of the steel fiber is 0.1-0.25mm, and the length is 12-15mm; The raw material and weight ratio of the superfine powder are slag powder: silicon powder: calcium sulfate whisker: aminopropyltriethoxysilane coupling agent diluent = 15:25:3.5:0.5. The cement is ordinary Portland 52.5 cement (conforming to "GB175-2007 General Portland Cement"); the slag powder is S95 grade (conforming to "GB / T 18046-2008 Granulated Blast Furnace Slag Powder Used in Cement and Concrete" ); the admixture i...

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Abstract

The invention provides reactive powder concrete and preparing method and purpose thereof. The reactive powder concrete is prepared from 400-1000 parts of cement, 100-500 parts of modified superfines, 50-200 parts of modified steel fiber, 900-1300 parts of quartz sand, 100-220 parts of quartz powder, 10-30 parts of admixture, and 100-250 parts of water. According to characteristics of inorganic whisker which it has no macroscopic defect, its crystal intensity approximates theoretical value of intact crystal, and mechanical strength is equivalent to force of neighboring atoms, the invention, by adding whisker, improves RPC-related properties with compressive strength and rupture strength up to construction requirements; by modification of steel fiber, it improves wrapping of slurry on steel fiber, enhances fracture energy and strength increase of RPC product and reduces interface microcrack.

Description

technical field [0001] The invention relates to the field of concrete materials, in particular to an active powder concrete and its preparation method and application. Background technique [0002] Reactive Powder Concrete (hereinafter referred to as RPC) is a new type of building material with excellent mechanical properties and durability after high-strength and high-performance concrete. It is a high-tech concrete composed of DSP (Densified System containing ultra-fine Particles) materials and fiber reinforced materials. During the use of existing RPC, there is a poor combination of steel fiber and slurry; although the folding ratio of RPC components has been greatly improved compared with ordinary concrete, there are still a large number of interface microcracks after RPC is hydrated. There are a large number of fine lattice defects inside the slurry, which seriously affect the strength of RPC. Contents of the invention [0003] In view of the above-mentioned shortco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B20/02C04B18/14C04B14/06C04B14/38C04B14/48
CPCC04B20/023C04B28/04C04B2201/50C04B18/141C04B14/062C04B14/383C04B14/48C04B14/06C04B2103/302Y02W30/91
Inventor 李云军刘建
Owner 重庆天维绿色建筑技术开发有限公司
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