Self-compacting mortar combination and preparation method thereof

A self-compacting and mortar technology, applied in the field of building materials, can solve the problems of lack of suitable self-compacting mortar, etc., and achieve obvious energy saving and emission reduction benefits, small segregation, and good perfusion effect

Active Publication Date: 2013-07-10
中国水利水电第七工程局成都水电建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Self-compacting mortar is an excellent grouting material, but there is no suitable self-compacting mortar for deep hole curtain grouting construction, especially for deep hole curtain grouting with different cracks

Method used

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  • Self-compacting mortar combination and preparation method thereof
  • Self-compacting mortar combination and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Self-compacting mortar preparation: prepared according to different self-compacting mortar ratio requirements, the self-compacting mortar production process includes: (1) Preparations before production: ① Select the self-compacting mortar ratio and prepare the corresponding raw materials; ② Before the production of self-compacting mortar, the raw materials should be tested to understand the moisture content and fineness modulus of the sand. ③ Make sure that the water in the transport tanker has been drained, and pay attention to stirring during transportation. (2) Matters needing attention in the production process: ① The mixing sequence of the self-compacting mortar is: put the weighed sand and cementitious materials into the mixer for dry mixing, and the dry mixing time of the mixer should not be less than 10 seconds. After adding water and admixtures Then continue to stir for more than 60 seconds. When the temperature is lower than 15°C, the stirring time should not ...

Embodiment 2 to Embodiment 6

[0040] Prepare the self-compacting mortar according to the ratio in Table 1 and test it, and compare it with the test results of cement slurry and ordinary mortar. The test results are shown in Table 2.

[0041] Table 1 Weight ratio of self-compacting mortar suitable for different cracks

[0042]

[0043]

[0044] In Table 1, SF(cm) is the diffusivity, VF(s) is the time through the standard V-shaped funnel, P 28 Mpa is the 28-day compressive strength.

[0045] Table 2 Comparison of performance indicators of cement slurry, ordinary mortar and self-compacting mortar

[0046] serial number

Performance parameters

Grout

Ordinary Mortar

self compacting mortar

1

Initial setting time (min)

121

210

240

2

Final setting time (min)

180

270

460

3

3-day compressive strength (MPa)

25.1

1.96

2.1

4

7-day compressive strength (MPa)

28.3

5.69

5.6

5

28-day compre...

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Abstract

The invention discloses a self-compacting mortar combination and a preparation method thereof. The self-compacting mortar combination comprises the following components by weight parts: 0.52-0.94 part of water, 1 part of cement, 0-0.55 parts of fly ash, 2.83-4.89 parts of sand, and 0.01-0.03 parts of additive, wherein the additive is composed of the following components by weight parts: 1 part ofmelamine, 0.2-0.6 parts of polyacrylamide high performance anti-washout agent, 0.1-0.5 parts of UWB-II type underwater anti-washout agent, and 0.05-0.15 parts of flocculating agent. The preparation method comprises the following steps: feeding the additive into a container based on the order and ratio of each component, stirring, and then adding each component of the self-compacting mortar into the container according to the ratio, and stirring. The self-compacting mortar of the invention is adaptable to different geological conditions, in this way, the comprehensive cost is greatly reduced, the usage of cement is greatly decreased, stirring time is shortened by about 20% than that for normal mortar, the clearance of broken zones is compactly filled without vibration, the mortar does not separate or bleed water even at the diffusance of 600 mm, the viscosity is good, the mortar can be used in deep hole curtain grouting in the presence of groundwater, and the grouting effect is good.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a self-compacting mortar material in building materials, in particular to a self-compacting mortar combination for deep-hole curtain grouting construction and a preparation method thereof. Background technique [0002] In existing large-scale building construction, anti-seepage construction is an important construction content. Generally, cement slurry or ordinary mortar is used for anti-leakage grouting construction. Cement slurry pouring has wide cracks, large cement unit consumption, high cost, many times of refilling, long construction period, and difficult control of slurry diffusion. Ordinary mortar pouring cracks are large, the degree of diffusion cannot meet the requirements, the unit consumption of cement is large, and the cost is high. [0003] Self-compacting mortar has high fluidity, no segregation, durability, uniformity and stability, and achieves compa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
Inventor 田彬聂美平蔡海燕任跃勤吴建军贺小平李东福
Owner 中国水利水电第七工程局成都水电建设工程有限公司
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