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Process for producing hardened bodies from hydraulically setting compositions

A composition and hydraulic technology, which is used in the field of preparing hardened bodies from hydraulic compositions, can solve problems such as huge energy costs

Active Publication Date: 2017-05-03
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to reduce energy consumption, it is also desirable to omit steam hardening because of the huge energy costs due to the use of steam

Method used

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  • Process for producing hardened bodies from hydraulically setting compositions
  • Process for producing hardened bodies from hydraulically setting compositions
  • Process for producing hardened bodies from hydraulically setting compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0020] The present invention includes an embodiment of a method for preparing a hardened body of a hydraulically setting composition comprising:

[0021] Step 1 of preparing a hydraulic composition by mixing glycerin, a binder, and water, using raw materials of a hydraulic composition containing a substance containing sulfate ions such that the molar ratio of sulfate ions to glycerin, i.e., sulfate ions / glycerin, is 5.0 to 20, and the content of sulfate ions is 3.0 to 15 parts by weight relative to 100 parts by weight of the cement; and

[0022] Step 2 of curing and hardening the hydraulic composition obtained in step 1.

[0023] In the present invention, the hydraulic composition contains sulfate ions. Sulfate ions can be mixed with cement and water. Sulfate ions may be included in the cement and additional sulfate may optionally be added in step 1 . The raw material for the hydraulically setting composition obtained in step 1 may contain glycerin, binder and water, and th...

Embodiment 1 and comparative example 1

[0209] Concrete was prepared using cement (C1) as raw material and tested (Tables 1, 2 and 2B).

Embodiment 2 and comparative example 2

[0211] Concrete was prepared using cement (C2) as raw material and tested (Tables 1 and 3).

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Abstract

The present invention provides a method for preparing a hardened body of a hydraulic composition prepared by mixing glycerin, a binder and water, the hydraulic composition containing sulfate ions, the method comprising the steps 1, that is, the hydraulic composition is prepared so that the molar ratio of sulfate ions to glycerol, ie, sulfate ions / glycerin, is 5.0 to 20 and the content of sulfate ions is 3.0 to 15 parts by weight relative to 100 parts by weight of the cement parts; and step 2, that is, curing and hardening the hydraulic composition obtained in step 1.

Description

[0001] Field of Invention [0002] The invention relates to a method for producing a hardened body from a hydraulically setting composition and to the hydraulically setting composition. [0003] Background of the invention [0004] Secondary products of concrete are obtained by mixing materials including cement, aggregate, water and dispersants, molding in various molds, and hardening. For these concretes, it is important to express high strength at an early stage in view of productivity or to improve the turnover rate of the mold because the mold is repeatedly used many times. For this purpose, the means adopted include (1) using high early strength Portland cement as a cement, (2) using various polycarboxylic acid compounds as admixtures to reduce the water content in the cement composition, and (3) steam hardening of concrete. [0005] Japanese Patent Publication JP-A64-83544 describes a rapid-hardening cement composition comprising a rapid-hardening cement, a polyol, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02
CPCC04B28/04C04B28/06C04B22/143C04B24/02C04B40/0263C04B2103/408C04B2103/50C04B22/147C04B22/08C04B28/02C04B2103/14
Inventor 吉浪雄亮滨井利正川上博行吉川洋平
Owner KAO CORP
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