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Cement admixture for repair, cement composition for repair using same, and cement mortar material for repair

A technology of cement composition and cement mortar, which is applied in the field of cement mortar materials for repair, can solve the problems of no display hardening delay, uneven processing surface, influence of resurfacing of paving materials, etc., and achieve the effect of excellent storage stability

Active Publication Date: 2012-11-07
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when only aluminum sulfate is used, the final setting time is greatly delayed, and sometimes pear skin is formed on the surface of the hardened body
In addition, it is described that aluminum sulfate with various water contents exists as aluminum sulfate, but there is no specific description of using aluminum sulfate hydrate, and there is no indication that calcium aluminosilicate glass, anhydrite, and aluminum sulfate hydrate are mixed to prevent the Delayed hardening due to long-term storage
[0011] In addition, when using rapid-hardening cement mortar for repairs made of rapid-hardening raw materials mainly composed of calcium aluminate glass and gypsum, since the thickness of the coating on the ground is several millimeters, it may harden during hydration. It is granular and produces unevenness on the construction surface, which affects the resurfacing of paved materials, and the processed surface becomes uneven
Since such rapid-hardening cement mortar for repairs is mixed with a setting regulator for adjusting the working time, if it is stored for a long time, the hardening time may be prolonged, and it is desired to improve it.

Method used

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  • Cement admixture for repair, cement composition for repair using same, and cement mortar material for repair
  • Cement admixture for repair, cement composition for repair using same, and cement mortar material for repair
  • Cement admixture for repair, cement composition for repair using same, and cement mortar material for repair

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0074] Prepare 100 parts of gypsum with CAS glass and 100 parts of gypsum with respect to 100 parts of CAS glass. In 100 parts of cement and 100 parts of cement and gypsum, make 20 parts of gypsum. Mix table with 100 parts of binder The aluminum sulfate shown in 1, the coagulation regulator and 150 parts of fine aggregate are used to prepare the cement mortar material. Water was added to the prepared cement mortar material so that the water / binder ratio became 70%, and it was kneaded for 3 minutes using a mortar mixer to prepare cement mortar (hereinafter, simply referred to as mortar). Using the prepared mortar, measure its unevenness, setting time and compressive strength during hardening in a constant temperature and humidity chamber at 20°C and 80% RH.

[0075] In addition, 500 g of the prepared cement mortar material was weighed, sealed in a polyethylene bag, heat-sealed, and placed on the top plate of the sample stand. The sample stage consists of a top plate and legs m...

experiment example 2

[0107] Preparation contains CAS glass and 100 parts of CAS glass and gypsum as shown in Table 2. In 100 parts of the binder containing cement and the quick-hardening component, make the quick-hardening component 20 parts, relative to 100 parts of the binder. 2.0 parts of aluminum sulfate C, the coagulation regulator shown in Table 2, and 150 parts of fine aggregate were mixed one by one to prepare a cement mortar material, and it was carried out in the same manner as in Experimental Example 1. The results are also listed in Table 2.

[0108] [Table 2]

[0109]

[0110] Gypsum is 100 parts (parts) relative to CAS glass, aluminum sulfate and coagulation regulator are 100 parts (parts) relative to the binding material, the setting time is immediately after mixing, and after acceleration is 10 days after the accelerated test. 3H, 1D and 7D of strength are the compressive strength after 3 hours, 1 day and 7 days, respectively.

[0111] The following results can be seen from Ta...

experiment example 3

[0115] Prepare a rapid-hardening component containing CAS glass and 100 parts of gypsum to 100 parts of CAS glass, and mix 20 parts of the rapid-setting component in 100 parts of the binder containing cement and the quick-hardening component to 100 parts of the binder 2.0 parts of aluminum sulfate C, the coagulation regulator shown in Table 3, and 150 parts of fine aggregate were used to prepare a cement mortar material, and it was carried out in the same manner as Experimental Example 1 except that. The results are also listed in Table 3.

[0116]

[0117] Coagulation regulator ii: citric acid, commercially available

[0118] [table 3]

[0119]

[0120] The coagulation regulator is 100 parts (parts) relative to the binding material. The straight time after the coagulation time is just after mixing, and the accelerated time is 10 days. After the accelerated test, the 3H, 1D and 7D of the compressive strength are respectively 3 hours, 1 day and The compressive strength a...

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Abstract

Disclosed is a cement mortar which exhibits good workability free from recesses and projections, while having excellent storage stability. Specifically disclosed are: a cement admixture for repair, which contains calcium aluminosilicate glass, gypsum, aluminum sulfate hydrate and a setting regulating agent; the cement admixture for repair, which additionally contains a water reducing agent; a cement composition for repair, which contains the cement admixture for repair and cement; a cement mortar material for repair, which contains the cement composition for repair and fine aggregate; the cement mortar material for repair, wherein the maximum particle diameter of the fine aggregate is 0.3 mm or less; a cement mortar for repair, which contains the cement mortar material for repair and water; and a construction method wherein a cement mortar for repair, which contains cement, calcium aluminosilicate glass, gypsum, aluminum sulfate hydrate, a setting regulating agent, fine aggregate and water, is applied to a floor surface.

Description

technical field [0001] The present invention relates to a repair cement admixture used in the construction field, a repair cement composition using the repair cement admixture, and a repair cement mortar material. Background technique [0002] Traditionally, repair materials have been generally used in the base of new paving in construction projects. Examples of floor coverings include vinyl chloride tiles, long boards, and the like. [0003] In some cases, the pavement is resurfaced by repairing the thickness of which cannot be obtained. In the unevenness adjustment performed at this time, resin or cement mortar material is used. [0004] As the cement mortar material, for example, use a quick-hardening mortar material made of a rapid-hardening raw material mainly composed of calcium aluminate glass and gypsum, knead the mortar material with a mixer or manual agitation, use a putty scraper, a floor scraper , to smooth the base (see Patent Document 1 to Patent Document 6)...

Claims

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Application Information

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IPC IPC(8): C04B22/08C04B22/14C04B28/02C04B24/06C04B24/18C04B24/22C04B24/26C04B24/30C04B111/72
CPCC04B28/02C04B2111/72C04B2111/60C04B40/0039
Inventor 大塚哲雄片山步
Owner DENKA CO LTD
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