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Dry concrete and preparation method thereof

A concrete and dry technology, applied to dry concrete and its preparation method, in the field of dry or dry mixed concrete, can solve the problems of insufficient concrete strength, poor comprehensive performance, poor fluidity, etc., and achieves prolonged setting time, low cost, good water absorption

Pending Publication Date: 2020-12-29
GUIZHOU ZHENGHE AERATED CONCRETE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to: provide a kind of dry concrete and preparation method thereof, in order to solve the common problems such as above-mentioned existing concrete strength is not enough, fluidity is poor, surface cracks, peeling etc., causes the problem of poor comprehensive performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]A dry concrete, calculated in parts by weight, including the following components: 160 parts of cement, 400 parts of rough stones at various levels, 150 parts of graded fine aggregate, 40 parts of fly ash, 60 parts of stone powder, 16 parts of core material, HPMC 0.15 parts; all grades of rough stones include rough powder with a particle size of less than 5mm, raw powder with a particle size of 5-10mm, rough powder with a particle size of less than 5mm, and a mass ratio of raw powder with a particle size of 5-10mm is 1:1; Fine-quality aggregates include fine-quality aggregates with a particle size of less than 0.075, fine-quality aggregates of 0.075-0.3mm, fine-quality aggregates of 0.3-0.6mm, fine-quality aggregates of 0.6-1.18mm, and fine-quality aggregates with a particle size of 0.075 or less. The weight ratio between 0.075-0.3mm fine aggregate, 0.3-0.6mm fine aggregate, and 0.6-1.18mm fine aggregate is 0.5:1:1:1:1.

[0034]The above-mentioned preparation method of dry concre...

Embodiment 2

[0039]On the basis of Example 1, a dry concrete, calculated in parts by weight, includes the following components: cement 180, 420 parts of raw stone at various levels, 170 parts of graded fine aggregate, 45 parts of fly ash, and 70 parts by weight Parts, core material 18 parts, HPMC 0.2 part; each grade of rough stone includes the quality of rough powder with a particle size of less than 5mm, raw powder with a particle size of 5-10mm, rough powder with a particle size of less than 5mm, and raw powder with a particle size of 5-10mm The ratio is 1:2; the weight ratio of fine aggregates with a particle size of less than 0.075, fine aggregates of 0.075-0.3mm, fine aggregates of 0.3-0.6mm, and fine aggregates of 0.6-1.18mm is 0.5:2 :2:2:1.

[0040]The preparation method is shown in Example 1.

Embodiment 3

[0042]On the basis of Example 1, a dry concrete, calculated in parts by weight, includes the following components: 200 parts of cement, 450 parts of raw stone at various levels, 200 parts of graded fine aggregate, 50 parts of fly ash, and stone powder 80 parts, 20 parts core material, 0.25 parts HPMC; all grades of rough stones include rough powder with a particle size of less than 5mm, raw powder with a particle size of 5-10mm, rough powder with a particle size of less than 5mm, and raw powder with a particle size of 5-10mm The mass ratio is 2:3; the weight ratio of fine aggregates with a particle size of less than 0.075, fine aggregates of 0.075-0.3mm, fine aggregates of 0.3-0.6mm, and fine aggregates of 0.6-1.18mm is 1: 2:3:3:2.

[0043]The preparation method is shown in Example 1.

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PUM

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Abstract

The invention discloses dry concrete and a preparation method thereof, particularly relates to the field of dry or dry-mixed concrete, aims to solve the problem of poor comprehensive performance of the existing concrete, and comprises the following components in parts by weight: 200 parts of cement, 450 parts of raw stones at all levels, 200 parts of graded fine aggregate, 50 parts of fly ash, 80parts of stone powder, 20 parts of a core material and 0.25 part of HPMC. The preparation method comprises the following steps: step 1, uniformly mixing the cement, the graded fine aggregate, the flyash, the stone powder, the core material and the HPMC in parts by weight to obtain a gel material; step 2, according to the parts by weight, adding each stage of raw stone into the gel material, and uniformly mixing; and 3, adding water according to the double-component ratio, mixing again to form a pouring concrete, wherein the prepared concrete is good in fluidity, cohesiveness and water retention, the problems of surface cracking, peeling and the like are avoided, the compressive strength is high, various properties are excellent, and use of the high-performance concrete can be promoted andachieved.

Description

Technical field[0001]A dry concrete and a preparation method thereof belong to the technical field of building materials, in particular to the technical field of dry or dry-mixed concrete.Background technique[0002]Concrete is a collective term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. The term concrete usually refers to the use of cement as a cementitious material, sand and stone as aggregates; it is obtained by mixing, forming and curing with water (with or without additives and admixtures) in a certain proportion Cement concrete, also called ordinary concrete, is widely used in civil engineering.[0003]The wet-prepared concrete currently on the market is generally transported to the construction site by tanker after the pre-mixing in the mixing station, pumped and poured, etc., and its storage time is short, generally less than 6 hours, which cannot meet the needs of the construction site, such as for structural col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B14/02C04B14/06C04B14/104C04B18/0445C04B18/08C04B18/027C04B24/383C04B2103/0068
Inventor 李玮贺靖陈英
Owner GUIZHOU ZHENGHE AERATED CONCRETE CO LTD