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Lactate activated cement and activator compositions

A technology of chemical activator and composition, applied in the direction of cement production, etc., which can solve the problems of working time, strength, durability and hardness, etc.

Inactive Publication Date: 2015-09-02
塞拉泰克有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Gravitt and Hicks' fly ash cement compositions do not have the working time, strength, durability and hardness required for many cement applications

Method used

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  • Lactate activated cement and activator compositions
  • Lactate activated cement and activator compositions
  • Lactate activated cement and activator compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] Tables 1a and 1b provide examples of cement mixtures using lactate activators. The mix listed in Table 1a was made at 95°F and used a lactate activator at 72°F. The mixtures listed in Table 1b were made at 72°F. In Tables 1a and 1b, the proportions of materials used in the stucco compositions are: cement 6.91 lb (including activator), C33 sand 10.80 lb, water 1.59 lb. The fractions were mixed for 4 minutes before the samples were prepared. The stucco tested had the following suitable composition:

[0049]

[0050] The total amount of Class C fly ash and Class F fly ash was adjusted to produce the difference in activator / retarder dosage.

[0051] In these tables, the weight percentages of the compositions of different activators and retarders are provided. The lactate activator consisted of a 60 wt% solids solution of neutralized lactic acid. The salt is a potassium-based salt. The retarder was a single source of technical grade boric acid obtained from Rio Tinto ...

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Abstract

The invention relates to a lactate activated cement and activator compositions and describes a cementitious composition in which the cementitious properties of fly ash are carefully controlled. The cementitious composition may be substantially free from harsh acids and bases such as citric acids (roughly equals to PRG pH 2.2) and alkali metal activators including alkali hydroxides (roughly equals to PRG pH 12-14) and metal carbonates (roughly equals to PRG pH 11.6). The use of these harsh chemicals creates acid base reactions during use of the products. Instead of these harsh chemicals, a lactic acid salt based activator is be used as a reaction accelerator. Boric compounds may be used as a retarder in the compositions.

Description

[0001] This application is a divisional application of Chinese patent application 201180013447.7 (PCT / US2011 / 020822) with a filing date of January 11, 2011. technical field [0002] The present invention discloses a new class of compositions for the manufacture of mixed hydraulic cementitious materials, their concrete and their stucco derivatives, which can be used in foundation construction, repair, Manufactured concrete products, armor, shotcrete and other applications. The reactions between calcium-containing industrial by-products and chemical activators, blockers, binding promoters, and mechanical strength improvers in these materials are controllable. Background technique [0003] Materials with pozzolanic properties consist of glassy silica and alumina that react with calcium in the presence of water and free lime to form calcium silicate hydrate and calcium aluminum silicate hydrate . There are two forms of natural pozzolan and industrial pozzolan. [0004] Indust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26
CPCY02P40/10
Inventor 格伦·舒玛切尔拉杰什库马尔·帕特尔
Owner 塞拉泰克有限公司