Cement composition for grouting and grout material comprising the same

A technology of cement composition and bonding material, applied in the field of grouting material and cement composition for grouting, can solve the problems of residual unreacted material, early hydration reaction, reduced durability and the like, and achieve the effect of good fluidity

Active Publication Date: 2008-09-03
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If less than 1500cm 2 / g, there will be unreacted substances remaining for a long time, which will reduce the durability. If it exceeds 4500cm 2 / g, the hydration reaction will be early, and the specified swelling property will not be obtained” ([0013 paragraph]), so it is not intended to use more than 4500cm 2 / g Bo’s specific surface area expansion (expansion material), and does not use a specific expansion material (expansion material) for the purpose of preventing the generation of air bubbles

Method used

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  • Cement composition for grouting and grout material comprising the same
  • Cement composition for grouting and grout material comprising the same
  • Cement composition for grouting and grout material comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In 100 parts of bonding materials, the expansion material shown in Table 1, 6 parts of volcanic ash fine powder, 0.0014 parts of foaming agent, 1.3 parts of naphthalene sulfonate-based water-reducer and 0.2 part of melamine-sulfonate-based water-reducer and 100 parts Mix the fine aggregate, prepare the grouting material, add water to make the ratio of water / binding material 32%, stir and mix with a high-speed manual mixer, make grouting mortar, measure its fluidity, and evaluate the foaming state.

[0052] In addition, the prepared grouting mortar was poured in a sand box in a constant temperature and humidity room at 20°C and 80% RH, and the curing after one day was water curing at 20°C, and the length change rate, volume expansion rate and compressive strength were measured. . The results are also listed in Table 1.

[0053] Materials used

[0054] Cement: Quick-setting Portland cement, commercially available

[0055] Expansion material A:C 4 AF expansion material...

Embodiment 2

[0076] Mix 2 parts of expansion material A, 2 parts of expansion material B, pozzolan fine powder shown in Table 2, 0.0014 parts of foaming agent, 1.3 parts of water reducing agent a and 0.2 parts of water reducing agent b and 100 parts of bonding material in 100 parts of bonding material It carried out similarly to Example 1 except having prepared the grouting material as a fine aggregate. The results are also listed in Table 2.

[0077] Table 2

[0078]

[0079] As can be seen from Table 2, the grouting mortar of the embodiment of No.2-2~2-4 and No.1-3 containing 3~10 parts of pozzolan fine powder in 100 parts of bonding material has obtained excellent flow No air bubbles are produced, the length change rate and volume expansion rate are kept moderate, and the compressive strength is high.

[0080] On the other hand, the grouting mortar of the comparative example of Experiment No. 2-1 which did not contain fine pozzolan powder had low fluidity, a large volume expansion ...

Embodiment 3

[0083] Mix 2 parts of expansion material A, 2 parts of expansion material B, 6 parts of pozzolan fine powder, 0.0014 parts of foaming agent, water reducing agent shown in Table 3 and 100 parts of fine aggregate in 100 parts of bonding material to prepare the grouting material , except that, it was carried out in the same manner as in Example 1. The results are also listed in Table 3.

[0084] Materials used

[0085] Water reducer c: Lignosulfonate-based water reducer, commercially available

[0086] Water reducer d: polycarboxylate water reducer, market product

[0087] table 3

[0088]

[0089] It can be known from Table 3 that the water reducer a (naphthalene sulfonate water reducer), water reducer b (melamine sulfonate water reducer), water reducer c (lignosulfonate Water-reducing agent), water-reducing agent d (polycarboxylate-based water-reducer) in combination And the grouting mortar of the embodiment that contains experiment No.3-1~3-3, No.1-3, No.3-8~3-13 has o...

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Abstract

A cement composition for grouting which has excellent flowability, is prevented from bubbling, retains an appropriate length change and volume expansion, and has high-strength performance; and a grout material comprising the cement composition. The cement composition for grouting comprises a cement, expanding materials, a fine pozzolan powder, a blowing agent, and two or more water-reducing agents selected from the group consisting of naphthalenesulfonic acid water-reducing agents, melaminesulfonic acid water-reducing agents, lignoesulfonic acid water-reducing agents, and polycarboxylic acid water-reducing agents (provided that a combination of a naphthalenesulfonic acid water-reducing agent and a polycarboxylic acid water-reducing agent is excluded), and is characterized in that the expanding materials comprise a calcium aluminoferrite expanding material having a Blaine specific surface area of 2,000 cm<2> / g or larger and a calcium sulfoaluminate expanding material having a Blaine specific surface area exceeding 4,500 cm<2> / g.

Description

technical field [0001] The invention relates to a cement composition for grouting used in civil engineering and construction fields and a grout material using the composition, in particular to a cement composition for grouting with high fluidity and high strength and the use of the composition grouting material. Background technique [0002] For a long time, as grouting material, it generally refers to adding a water reducer to the cement, and adding a calcium sulfoaluminate-based or lime-based expansion material or a foaming agent such as aluminum powder to make a non-shrinkable material. Or quartz sand, etc. are mixed in it, as paste or mortar, in civil engineering, building construction, especially in small gaps in concrete structures, gaps in inverted masonry, repair or reinforcement of structures, It is widely used in the construction method of filling under the foundation of mechanical equipment and under the track cement board, etc. [0003] In addition, grouting ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B18/14C04B22/04C04B22/08C04B22/14C04B24/18C04B24/22C04B24/26
CPCC04B28/02C04B2111/70C04B22/008C04B2111/1006C04B2103/0088C04B2103/302C04B2103/42C04B24/2605C04B22/0093C04B24/22C04B24/18C04B18/14C04B22/04C04B22/08
Inventor 大塚哲雄八木彻白岩亨五十岚数马
Owner DENKA CO LTD
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