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Recycled concrete and preparation method thereof

A technology of recycled concrete and recycled coarse aggregate, applied in the field of concrete, can solve the problems of uneven dispersion of polypropylene fibers, achieve the effects of enhancing strength, improving cross-linking and dispersion, and enhancing cross-linking

Active Publication Date: 2020-11-17
陕西新意达建材产业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of uneven dispersion of polypropylene fibers in the prior art, the first purpose of the present invention is to provide a recycled concrete, which has the advantage of good crack resistance

Method used

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  • Recycled concrete and preparation method thereof
  • Recycled concrete and preparation method thereof
  • Recycled concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0052] Mix 1 kg of polypropylene fiber with 0.1 kg of oxidant, soak for 1 hour and wash to obtain the first product, add the first product to the coating solution and mix to obtain modified polypropylene fiber.

[0053] The oxidizing agent consists of 0.004kg of K 2 Cr 2 o 7 , 0.007kg of water, 0.088kg of concentrated H 2 SO 4 composition.

[0054] The coating solution consists of 1 kg of silane coupling agent, 0.2 kg of hydrophilic surfactant, 1 kg of calcium sulfoaluminate and 0.2 kg of carbon black.

preparation example 2

[0056] Mix 2 kg of polypropylene fiber with 0.15 kg of oxidizing agent, soak for 1.5 h and wash to obtain the first product, add the first product to the coating solution and mix to obtain modified polypropylene fiber.

[0057] The oxidant consists of 0.009kg of K 2 Cr 2 o 7 , 0.0012kg of water, 0.129kg of concentrated H 2 SO 4 composition.

[0058] The coating solution consists of 1.3kg of acetate coupling agent, 0.3kg of hydrophilic surfactant, 1.2kg of calcium sulfoaluminate and 0.3kg of carbon black.

preparation example 3

[0060] Mix 3 kg of polypropylene fiber with 0.2 kg of oxidizing agent, soak for 2 hours and wash to obtain the first product, add the first product to the coating liquid and mix to obtain modified polypropylene fiber.

[0061] The oxidant consists of 0.014kg of K 2 Cr 2 o 7 , 0.0017kg of water, 0.169kg of concentrated H 2 SO 4 composition.

[0062] The coating solution consists of 1.5kg of silane coupling agent, 0.5kg of hydrophilic surfactant, 1.5kg of calcium sulfoaluminate and 0.5kg of carbon black.

[0063] Preparation of Modified Construction Waste Regenerated Coarse Aggregate

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Abstract

The invention discloses recycled concrete and a preparation method thereof. The recycled concrete comprises construction waste recycled coarse aggregate, stones, cement, a mineral admixture, an excitant, a water reducing agent, fibers and water, wherein the fibers comprise modified polypropylene fibers and plant fibers, and the modified polypropylene fiber modification process comprises the following steps: adding polypropylene fibers into an oxidant, mixing, soaking, washing to obtain a first intermediate product, adding the first intermediate product into a coating material, and uniformly mixing to obtain modified polypropylene fibers. The preparation method of the recycled concrete comprises: uniformly mixing a mineral admixture, cement and an excitant, adding water accounting for 1 / 3-1 / 2 of the total weight, and uniformly mixing to obtain a first intermediate product; uniformly mixing construction waste recycled coarse aggregate, the modified polypropylene fiber and plant fiber toobtain a second intermediate product; and uniformly mixing a water reducing agent, the first intermediate product, the second intermediate product, stones and the balance of water to obtain the recycled concrete. The anti-cracking performance of the recycled concrete is good.

Description

technical field [0001] The invention relates to the concrete field, more specifically, it relates to a recycled concrete and a preparation method thereof. Background technique [0002] With the development of society, there are more and more buildings and construction projects of all kinds. However, with the transformation of the city, a large number of abandoned buildings in the city form construction waste. The disposal of these construction waste not only requires a large area of ​​storage yard, but also Also spend a lot of manpower and material resources. With the development of construction science, effective utilization of construction waste has become a new topic. [0003] In the application document with the publication number CN110104997A, a recycled concrete and its production process are disclosed, which specifically include the following raw material composition: coarse aggregate, fine aggregate, cement, mineral admixture, fiber, rubber particles, water and Add...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B16/06C04B18/16C04B18/24C04B20/02C04B20/10
CPCC04B28/00C04B16/0633C04B18/248C04B18/16C04B20/107C04B20/023C04B2201/50C04B14/02C04B18/08C04B18/141C04B14/104C04B14/365C04B2103/302C04B20/1055C04B20/1018Y02W30/91
Inventor 张强
Owner 陕西新意达建材产业发展有限公司
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