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Highly abrasion-resistant and high-strength concrete and preparation method thereof

A high-strength concrete and high-wear-resistant technology, applied in the field of concrete, can solve the problems of wear resistance, poor wear resistance of cement paste, etc., and achieve the effects of compact internal structure, shortening the demoulding time, and accelerating the hydration reaction.

Inactive Publication Date: 2018-08-21
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, the anti-wear performance of cement paste is poor, so the anti-wear performance of concrete depends mostly on the hardness of the aggregate used

Method used

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  • Highly abrasion-resistant and high-strength concrete and preparation method thereof
  • Highly abrasion-resistant and high-strength concrete and preparation method thereof
  • Highly abrasion-resistant and high-strength concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Cement: Shield Stone P.O 42.5 Ordinary Portland Cement; Silica Fume: Commercially available SiO 2 The content (mass content) is not less than 92%; quartz powder: commercially available 325 mesh; ~0.212mm (40~70 mesh), fine quartz sand 0.212~0.125mm (70~120 mesh); steel fiber: the length of Shanghai Bekaert No. 2 Steel is 13±10% mm, and the diameter is 0.2±0.03mm Steel fiber, tensile strength ≥ 2850Mpa, density 8000kg / m 3 . Water reducing agent: polycarboxylate water reducing agent, water reducing efficiency is 25%; ) mixed with NaOH with a purity of ≥99% to make a water glass solution with a modulus of 1.4; nitrite: (Ca(NO 2 ) 2 ) purity ≥ 98%, white crystalline solid. The mix ratio of high wear-resistant and high-strength concrete is shown in Table 1.

[0045] Table 1 Mix ratio of high wear-resistant and high-strength concrete

[0046]

[0047] Weigh each raw material according to the mixing ratio and stir, and the stirring sequence is as follows:

[0048] P...

Embodiment 2

[0058] Cement: Shield Stone P.O42.5 Ordinary Portland Cement; Silica Fume: Commercially available SiO 2 The content is not less than 92%; quartz powder: commercially available 325 meshes; 40~70 mesh), fine quartz sand 0.212~0.125mm (70~120 mesh); steel fiber: steel fiber with a length of 13±10% mm and a diameter of 0.2±0.03mm produced by Shanghai Bekaert No. 8000kg / m 3 . Water reducing agent: polycarboxylate water reducing agent, water reducing efficiency is 25%; ) mixed with NaOH with a purity ≥99%; nitrite: (Ca(NO 2 ) 2 ) purity ≥ 98%, white crystalline solid. The mix ratio of high wear-resistant and high-strength concrete is shown in Table 3.

[0059] Table 3 Mix ratio of high wear-resistant and high-strength concrete

[0060]

[0061] Weigh each raw material according to the mixing ratio and stir, and the stirring sequence is as follows:

[0062] Pour cement, silica fume, quartz powder and calcium nitrite into the mixer and stir for 2 minutes to make the four po...

Embodiment 3

[0072] A high wear-resistant high-strength concrete. The components of the concrete include 1147 parts of cementitious material, 1207 parts of quartz sand, 22.94 parts of water reducing agent, 19.85 parts of defoaming agent, and 22.94 parts of alkali activator. 36.53 parts of strong agent and 127.12 parts of water.

[0073] Wherein, the cementitious material includes 63.7% of cement, 15.9% of silica fume and 20.4% of quartz powder in terms of mass percentage; wherein the cement is not lower than P.O42.5 Portland cement, and SiO in silica fume 2 The mass content is not less than 92%; the particle size of quartz powder is not greater than 325 mesh.

[0074] The quartz sand includes coarse quartz sand, medium quartz sand and fine quartz sand with a mass ratio of 1:0.46:0.32, wherein the particle size of the coarse quartz sand is 0.850-0.425 mm, and the particle size of the medium quartz sand is 0.425 mm. ~0.212mm, the particle size of fine quartz sand is 0.212~0.125mm.

[0075]...

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Abstract

The invention discloses highly abrasion-resistant and high-strength concrete and a preparation method thereof. The highly abrasion-resistant and high-strength concrete comprises the following components in parts by mass: 1058-1147 parts of a binding material, 1120-1271 parts of quartz sand, 165-205 parts of steel fibers, 21.17-22.94 parts of a water reducing agent, 19.41-19.85 parts of an antifoaming agent, 21.17-22.94 parts of an alkali activator, 33.71-36.53 parts of nitrite early strength agents and 127.12-159.62 parts of water. Under the action of the alkali activator, the binding materialcontains lots of Si-O and Al-O bond rupture, SiO4 and AlO4 tetrahedrons are rapidly dissolved out, and lots of inorganic high-molecular polymers are rapidly formed by virtue of condensation polymerization, so that the early strength of the concrete is quickly increased, and the early strength of the high-strength concrete is improved by achieving an effect of catalyzing a cement hydration processby the nitrite. Due to the doped steel fibers, the abrasion resistance of the concrete is improved.

Description

technical field [0001] The invention relates to concrete, in particular to a high-wear-resistant high-strength concrete and a preparation method thereof. Background technique [0002] High-strength concrete has super high strength, excellent durability and good working performance, and its wear resistance is also higher than that of ordinary concrete. The wide application of high wear-resistant and high-strength concrete will subvert the current design and construction of civil engineering structures and other fields. Foreign companies have prepared high-performance and high-wear-resistant concrete by sintering wear-resistant aggregates such as bauxite and alumina ceramics, and applied them in actual projects. The raw materials of high-strength concrete commonly used at present include: cement, silica fume, ground quartz powder, mineral fine admixture, quartz sand and high-efficiency water reducer. [0003] At present, due to the restriction of the high-temperature curing ...

Claims

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Application Information

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IPC IPC(8): C04B28/04B28B1/52B28B11/24B28C5/40C04B111/20
CPCB28B1/523B28B11/245B28C5/402C04B28/04C04B2111/20C04B2201/50C04B14/06C04B18/146C04B14/48C04B22/085C04B2103/302C04B2103/50C04B22/00C04B22/062
Inventor 陶毅陈程绩赵热忱李晓琴
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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