Early-strength water reducer for recycled aggregate concrete

A technology of early-strength water reducer and recycled aggregate, applied in the field of early-strength water reducer, can solve the problems of unsuitable recycled aggregate concrete, etc., achieve good early-strength effect, low dosage, and improve workability

Active Publication Date: 2013-06-12
北京新奥混凝土集团有限公司
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  • Abstract
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Problems solved by technology

[0008] The purpose of the present invention is to provide an early-strength water reducer for recycled aggregate concrete,

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  • Early-strength water reducer for recycled aggregate concrete
  • Early-strength water reducer for recycled aggregate concrete
  • Early-strength water reducer for recycled aggregate concrete

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[0018] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] The raw materials used in the early-strength superplasticizer for recycled concrete provided by the present invention and the weight percentage of each raw material are as follows: polycarboxylate superplasticizer 20%-25%, triisopropanolamine 1%-6%, triethanolamine 0.5%-2%, sodium thiocyanate 5%-15%, calcium formate 3%-10%, water 42%-70.5%. The early-strength superplasticizer can be obtained by mixing and stirring these raw materials evenly. The early-strength water reducer accounts for 2.0%-3.0% of the total weight of the cementitious material in the recycled coarse and fine aggregate concrete product.

[0020] Th...

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Abstract

The invention provides an early-strength water reducer for recycled aggregate concrete, which is suitable for the field of building materials. The the early-strength water reducer comprises the following raw materials by weight percent: 20-25% of a polycarboxylic acid water reducer, 1-6% of tri-isopropanolamine, 0.5-2% of triethanolamine, 5-15% of sodium sulfocyanate, 3-10% of calcium formate, and 42-70.5% of water. The early-strength water reducer provided by the invention is low in dosage, good in early-strength effect, free from chloride ions, resistant to the corrosion of steel bars, suitable for recycled concrete, and capable of enhancing the early strength of a recycled concrete product and improving the peaceability of a recycled concrete mixture.

Description

[0001] technical field [0002] The invention belongs to the field of building materials, in particular to an early-strength water reducer for recycled aggregate concrete. [0003] Background technique [0004] In the face of huge energy consumption in the construction industry, the recycling of construction waste has become an irreversible trend. The reuse of construction waste is already an important part of improving the environment. In terms of recycling construction waste, it is mainly broken into recycled coarse and fine aggregates, and then used in concrete or concrete products. [0005] Early strength superplasticizer is an admixture that accelerates the development of early strength of concrete. Early-strength water reducer can promote the hydration and hardening of cement, shorten the maintenance cycle of concrete products, speed up the construction speed, and improve the turnover rate of formwork and site. The main types of early strength agents are: inorganic...

Claims

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Application Information

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IPC IPC(8): C04B24/26C08F290/06C08G65/48
Inventor 张召伟肖旻范宏宗邢丽君尚百雨
Owner 北京新奥混凝土集团有限公司
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