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Cement mortar composition for grout and grout mortar obtained from the same

A technology of cement mortar and composition, applied in the field of grouting, to achieve the effects of good fluidity, high durability, high strength and durability

Inactive Publication Date: 2009-09-16
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Document 5 does not disclose that such a heavy mortar is suitable for quick-setting grouting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 100 parts of binding materials contain the fast curing agent shown in table 1 (the amount of cement is to subtract the amount of fast curing agent from 85 parts), 10 parts of pozzolan micropowder, 2.5 parts of expansive material and 2.5 parts of micropowder cement, Then, 0.75 parts of setting retardant, 2.5 parts of shrinkage reducing agent, 0.25 parts of melamine sulfonate-based water-reducer, 0.2 parts of polycarboxylate-based water-reducer, 0.0025 parts of Foam material, 0.003 parts of tackifier and 150 parts of fine aggregate are used to make cement mortar composition for grouting, and then mixed with 34 parts of water with a high-speed manual mixer to make grouting, and measure its fluidity, Bleeding rate, volume expansion rate and compressive strength. The results are summarized in Table 1.

[0068] Materials used:

[0069] Cement: Ordinary Portland cement, density 3.15g / cm 3 , commercially available

[0070] Fast curing agent: Calcium aluminum silicate glass / ...

Embodiment 2

[0093] Except that 100 parts of the bonding material contained 18 parts of the fast curing agent and the pozzolan fine powder shown in Table 2, it was made into grout in the same way as in Example 1, and then measured. The results are summarized in Table 2.

[0094] Table 2

[0095] test

No. volcanic ash fine powder

(share) fluidity

(Second) Bleeding rate

(%) volume expansion

Rate(%) 28 days old

compressive strength

(N / mm 2 )

Remark

2-1 0 0.05 +0.30 65.8 comparative example 2-2 5 9.8 0.0 +0.32 64.4 Example 1-5 10 7.4 0.0 +0.48 64.8 Example 2-3 15 6.2 0.0 +0.54 64.5 Example

[0096] - can not be determined

[0097] As can be seen from Table 2, the grouting of the embodiment containing pozzolanic powder has good fluidity, no bleeding, low shrinkage, and high compressive strength (test No.2-2, 1-5, 2-3 ). On the contrary, the grout of the comparative example ...

Embodiment 3

[0099] Except that 100 parts of the bonding material contained 18 parts of the fast curing agent, and the setting retarder shown in Table 3 was added to 100 parts of the bonding material, the grouting was performed in the same manner as in Example 1, and then measured. The results are summarized in Table 3.

[0100] table 3

[0101] test

[0102] It can be seen from Table 3 that the grouting of the example with the addition of the coagulation retarder has good fluidity, no bleeding, proper coagulation time, and high compressive strength.

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Abstract

A cement mortar composition for grouts which retains satisfactory flowability, is free from bleeding and material separation, has an anti-cracking ability due to high strength, high durability, and reduction in dry shrinkage, and is for use in applications such as foundations for machines; and a grout mortar obtained from the composition. The cement mortar composition for grouts comprises a binder, a setting retarder, a water-reducing agent, and a fine aggregate. It is characterized in that the binder comprises a quick hardening material comprising a cement, calcium aluminosilicate glass, and plaster and a fine pozzolan powder, the water-reducing agent comprises at least a polycarboxylate-type water-reducing agent, and the fine aggregate is a heavy aggregate having a density of 3.0 g / cm<3> or higher. The grout mortar is obtained by kneading the cement mortar composition together with water.

Description

technical field [0001] The present invention mainly relates to a cement mortar (cement mortar) composition for grout used in civil engineering and construction, in particular, relates to a cement mortar composition with good fluidity, high strength, high durability and low shrinkage Cement mortar composition for grouting and grout mortar using the same. Background technique [0002] In the past, as a grouting material, a water reducing agent was generally added to cement, and further, a calcium sulfoaluminate-based or lime-based expansion material or a foaming agent such as aluminum powder was added to prevent shrinkage, and then mixed with these River sand or silica sand is used as paste or mortar, which is widely used in civil engineering and construction engineering, especially for small gaps in concrete structures, gaps generated in inverted masonry methods, repair or reinforcement of structures, and mechanical devices. Construction methods for filling under foundations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/08C04B14/02C04B14/04C04B18/14C04B22/04C04B22/06C04B22/10C04B22/14C04B24/06C04B24/26C04B24/30C04B24/32C04B24/38C04B28/02
CPCC04B2103/308C04B2111/70C04B28/14C04B28/02Y02W30/91C04B7/02C04B18/14C04B24/2647C04B2103/0088C04B2103/22C04B11/28
Inventor 白岩亨大塚哲雄八木彻
Owner DENKA CO LTD
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