Chloride-free early-strength water-reducing agent capable of improving concrete workability

An early-strength water-reducing agent and concrete technology, applied in the field of early-strength water-reducing agents, can solve the problems of corrosion of steel bars, insignificant early-strength effect, low water-reducing rate, etc., achieving easy pouring, saving cement, and high water-reducing rate. Effect

Active Publication Date: 2015-12-23
滁州京安工贸有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the early-strength water-reducing agents used have the disadvantages of low water-reducing rate and inconspicuous early-strength effect, which cannot meet the needs of concrete construction requiring early-strength requirements, and some early-strength water-reducing agents contain chloride ions, which will produce damage to steel bars. Rust effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Disperse 20 parts of alum mud, 15 parts of saponin powder and 12 parts of tea saponin in 35 parts of ethanol, let it stand for 30 minutes, then heat it to 60°C and keep stirring for 20 minutes, then add 10 parts of polyamide resin, mix Evenly, to obtain material I;

[0025] (2) Add 15 parts of alkyl glucoside and 10 parts of sugarcane molasses to 250 parts of water, mix well, add 10 parts of nano-talc powder, and then microwave at a microwave frequency of 2450 MHz and a power of 600 W for 15 minutes to obtain material II;

[0026] (3) Add 15 parts of modified starch and 6 parts of xanthan gum to 65 parts of naphthalene or its homologue, mix well, heat to 60°C and keep stirring for 15 minutes to obtain material III;

[0027] (4) Add material I, material II, material III, 8 parts of ascorbic acid and 6 parts of itaconic acid into a ball mill, and ball mill until the fineness is less than 0.1mm, then it can be directly packed in solution barrels, or dried and crushed i...

Embodiment 2

[0031] (1) Disperse 25 parts of alum mud, 20 parts of saponin powder and 15 parts of tea saponin in 40 parts of ethanol, let it stand for 30 minutes, then heat it to 60°C and keep stirring for 20 minutes, then add 15 parts of polyamide resin, mix Evenly, to obtain material I;

[0032] (2) Add 18 parts of alkyl glycosides and 12 parts of sugarcane molasses to 300 parts of water, mix well, add 15 parts of nano-talc powder, and then microwave at a microwave frequency of 2450 MHz and a power of 600 W for 15 minutes to obtain material II;

[0033] (3) Add 20 parts of modified starch and 7 parts of xanthan gum to 70 parts of naphthalene or its homologues, mix evenly, heat to 60° C. and keep stirring for 15 minutes to obtain material III;

[0034] (4) Add material I, material II, material III, 10 parts of ascorbic acid and 7 parts of itaconic acid into a ball mill, and ball mill until the fineness is less than 0.1mm, then it can be directly packed in a solution barrel, or dried and c...

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PUM

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Abstract

The invention discloses a chloride-free early-strength water-reducing agent capable of improving concrete workability and relates to the technical field of concrete admixtures. The chloride-free early-strength water-reducing agent is prepared from, by weight, 60-70 parts of naphthalene or homolog, 20-25 parts of alum sludge, 15-20 parts of modified starch, 15-20 parts of shikakai powder, 12-18 parts of alkyl glycoside, 10-15 parts of nanometer talcum powder, 10-15 parts of tea saponin, 10-15 parts of polyamide resin, 8-12 parts of cane molasses, 7-10 parts of ascorbic acid, 5-8 parts of xanthan gum, 5-8 parts of itaconic acid, 30-40 parts of ethyl alcohol, and 250-300 parts of water. By the adoption of the early-strength water-reducing agent, water-reducing rate is high, the early-strength of concrete can be improved, concrete workability can be effectively improved, and pouring, densification and forming can be conducted conveniently by constructors. The early-strength water-reducing agent is suitable for steam-curing concrete, ordinary reinforced concrete which is constructed at a temperature not lower than -5 DEG C and has an early-strength requirement, and prestressed concrete.

Description

Technical field: [0001] The invention relates to the technical field of concrete admixtures, in particular to a chlorine-free early-strength water reducer that can improve the workability of concrete. Background technique: [0002] Concrete admixtures refer to substances added to improve concrete performance before or during concrete mixing. Because admixtures can effectively improve the performance of concrete and have good economic benefits, they have been widely used in many countries, and their application in engineering has attracted more and more attention, becoming an indispensable material in concrete. Early-strength superplasticizer is an admixture that accelerates the early strength development of concrete. It can promote the hydration and hardening of cement, shorten the maintenance period of concrete, speed up construction, and increase the turnover rate of formwork and site. [0003] At present, the early-strength water-reducing agents used have the disadvantag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38
Inventor 王文斌毛凯王冉王文飞
Owner 滁州京安工贸有限责任公司
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