A kind of active powder concrete product and preparation method thereof

A technology for concrete products and reactive powder, applied in the field of concrete, can solve the problems of unfavorable large-scale production of reactive powder concrete, difficult construction, poor fluidity, etc., and achieve the effects of easy processing, improved impermeability, and good fluidity

Inactive Publication Date: 2019-06-21
HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition, the existing reactive powder concrete has poor fluidity during preparation and is difficult to construct, which is not conducive to large-scale production of reactive powder concrete in industry.

Method used

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  • A kind of active powder concrete product and preparation method thereof
  • A kind of active powder concrete product and preparation method thereof
  • A kind of active powder concrete product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Refer to the following methods to prepare active powder concrete products and determine their fluidity, compression resistance and flexural resistance

[0053] 1. Material taking and weighing: According to the mixing ratio, use an electronic balance and a measuring cylinder to weigh the following raw materials respectively, with an allowable error of 0.1g:

[0054] 608g of cement, 98.8g of silica fume, 53.2g of fly ash, 154.3g of quartz sand, 231.5g of gold tailing sand, 716.6g of ordinary sand, 152ml of water, 13.7g of water reducing agent, and 124.8g of steel fiber, wherein the cement is Ordinary Portland cement (P.O42.5) produced by Xuanhua Jinyu Cement Co., Ltd., the particle size of the quartz sand is between 0.15 and 0.6mm, and the particle size of the gold tailing sand is between 0.075 and 0.3mm Between, the particle size of the ordinary sand is between 0.15 and 1.18mm, the water reducer is a polycarboxylate water reducer, the steel fiber is thin round, the surfa...

Embodiment 2～8

[0063] The reactive powder concrete of embodiment 2~8 is prepared with reference to the method described in embodiment 1, and detects its fluidity, compression resistance and flexure resistance, and its difference is only that the formula of each raw material is as shown in the following table:

[0064] The raw material ratio table of active powder concrete products described in table 1 embodiment 2~8

[0065]

[0066]

experiment example 1

[0072] Experimental Example 1 Determination of Optimum Dosage of Water Reducer

[0073] According to the compatibility experiment between water reducing agent and cement, the optimal dosage of water reducing agent is determined. The experimental results are shown in Table 3. It can be seen that the mass ratio of water reducing agent to gel material is in the range of 1.7-1.9:100 The internal flow is good, and the fluidity is the best when the mass ratio of the water reducer to the gel material is 1.8:100.

[0074] Table 3 cement compatibility test

[0075]

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Abstract

The invention provides an active powder concrete product and a preparation method thereof. The active powder concrete product is prepared from the following raw materials: cement, silica fume, fly ash, quartz sand, gold tailing sand, common sand, steel fibers, water reducing agent and water, wherein the proportioning of all raw materials is defined, so that the active powder concrete product disclosed by the invention has the advantages of good compression resistance, strong flexural strength, a good internal structure, good mobility in a concrete processing procedure, convenient processing and molding and good construction performance. Because the mobility of the concrete in the preparation process is good, according to the preparation method disclosed by the invention, active powder concrete can be easily and massively produced; meanwhile, the distribution of steel fibers in the concrete is promoted by increasing dry stirring time; through a heat curing way, the activity of active components in the concrete product is improved, the compression resistance is enhanced, and the mechanical property is promoted.

Description

technical field [0001] The invention relates to the field of concrete, in particular to an active powder concrete product and a preparation method thereof. Background technique [0002] Reactive powder concrete (RPC) is a new type of ultra-high strength concrete with ultra-high strength, high toughness, low brittleness, durability and good volume stability, and has broad application prospects. It is composed of cement, fly ash, quartz sand, silicon Ash, high-efficiency water reducer, etc., in order to improve the toughness and ductility of RPC, steel fibers are added, and appropriate pressure, heating and other molding maintenance processes are adopted during the coagulation and hardening of RPC. Since the active fine powder occupies a large proportion, so It is called reactive powder concrete. This new type of active powder concrete not only has high compressive and flexural strength, but also has volume stability, durability and fatigue resistance much higher than ordinar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2111/00017C04B2201/50C04B18/146C04B18/08C04B14/06C04B18/12C04B14/48C04B2103/302
Inventor 元敬顺张会芳孙婧阎杰黄洪亮
Owner HEBEI INSTITUTE OF ARCHITECTURE AND CIVIL ENGINEERING
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