Self compacting high strength mortar

A self-compacting and high-strength technology, applied in the field of grouting material and self-compacting high-strength mortar, can solve the problems of fast fluidity loss, unsuitable for mixing and conveying, high price, etc., and achieves small loss over time, small fluidity and cost reduction Effect

Inactive Publication Date: 2007-09-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these grouting materials often use special cement and special fine aggregate, and the price is relatively expensive; on the other hand, these grouting materials often lose fluidity quickly and require mixing and use, and are not suitable for mixing and conveying in large batches

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Self-compacting high-strength mortar prepared with ordinary Portland cement. See Table 1 for raw materials and specifications, and Table 2 for material ratios and properties.

[0029] Material

[0030] project

Embodiment 2

[0031] Example 2: Self-compacting high-strength mortar prepared with Portland cement. The specifications and manufacturers of the materials used are shown in Table 3. The ratio and performance of the materials are shown in Table 4.

[0032] Material

Specification or grade

source

cement

PII 52.5R

Jiaxin Jingyang Cement

Silica fume

EM920U

Elkem International Trading Shanghai Co., Ltd.

stone powder

double fly powder

Shanghai stone powder factory

expansion agent

UEA

Shanghai Newman New Building Material Factory

yellow sand

Pass 2.5mm sieve

Ordinary yellow sand

Superplasticizer

GLENIUM SP-8CN

Shanghai Master Building Materials Co., Ltd.

[0033] Table 4 Self-compacting high-strength mortar prepared with Portland cement and its comparative examples

[0034] project

Embodiment 3

[0035] Example 3: Using ordinary Portland cement, a self-compacting high-strength mortar was prepared according to the prefabricated dry-mixed mortar method. See Table 5 for raw material specifications, and Table 6 for dry powder ratios.

[0036] Material

Specification or grade

source

cement

PO42.5

Shanghai Cement Plant

Silica fume

EM920U

Elkem International Trading Shanghai Co., Ltd.

stone powder

double fly powder

Shanghai stone powder factory

expansion agent

UEA

Shanghai Hualian Admixture Factory

yellow sand

Pass 2.5mm sieve

Ordinary yellow sand, dry

Superplasticizer

GLENIUM SP-8CN

Shanghai Master Building Materials Co., Ltd.

[0037] Material

Dosage

% by weight

Remark

cement

30

All dry ingredients are pre-mixed into a dry powder

stone powder

12

Silica fume

2.1

UEA expansion agent ...

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Abstract

The present invention belongs to the field of building material technology, and is especially one kind of self compacting high strength mortar. The self compacting high strength mortar consists of portland cement, stone powder, silica fume, expansion agent and water reducing agent of polycarboxylate in certain weight proportion. The self compacting high strength mortar with new type of water reducing agent has very low flowability loss, 28 day compressive strength as high as 70-90 MPa and construction convenience and low cost.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a self-compacting high-strength mortar, which can be used as a grouting material. Background technique [0002] In recent years, the application of reinforced concrete structures with dense bars has been increasing. Due to the small spacing between steel bars, it is not convenient to vibrate such concrete structures when pouring, and it is necessary to use concrete with self-compacting functions. Therefore, self-compacting concrete in the world Applications are growing rapidly. In the reserved holes for shear studs of continuous bridges with reinforced concrete structures, the steel bars and shear nails are interlaced, and the spacing between the steel bars is smaller, and the minimum spacing between the steel bars may be less than 15 mm. According to the requirements of reinforced concrete that the maximum aggregate particle size is less than 3 / 4 of the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B14/06C04B24/24
Inventor 钟世云吴冲
Owner TONGJI UNIV
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