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Water reducing agent for construction waste recycled concrete

A technology of concrete water reducing agent and construction waste, which is applied in the field of water reducing agent and construction waste recycling concrete water reducing agent, can solve the problems of unsuitable solid construction waste, high viscosity and difficult construction, and achieve good economic benefits and social benefits. Benefit, improved workability, well-adapted effect

Inactive Publication Date: 2019-11-01
徐州巨龙新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, usually under the condition of water-binder ratio, the solid waste construction waste concrete mixture has a high viscosity, construction is difficult, and it is difficult to adapt to the development of modern construction technology, which has become a key factor restricting the development of construction waste reuse. Ordinary water reducers are not suitable for solid construction waste

Method used

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  • Water reducing agent for construction waste recycled concrete

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specific Embodiment approach

[0012] A concrete water reducer for reuse of construction waste, the water reducer comprises the following components by mass: nitrate: 10-22 parts; β-naphthalenesulfonate formaldehyde condensate: 12-22 parts; lignin sulfonate salt: 2-5 parts; dodecylbenzenesulfonate: 0.5-2.5 parts; the nitrate is a mixture of barium nitrate and lead nitrate, wherein 1.5-3 parts of barium nitrate, 8-20 parts of lead nitrate, The water reducing agent is in powder form, and its particle diameter is less than 0.075mm.

[0013] The β-naphthalenesulfonate formaldehyde condensate is β-naphthalenesulfonate sodium formaldehyde condensate, the lignosulfonate is calcium lignosulfonate, and the dodecylbenzenesulfonate is dodecane Sodium benzenesulfonate, the chemical formula of the β-naphthalenesulfonate formaldehyde condensate is (C10H6CH2NaSO3) n, wherein n is 9-12.

[0014] The construction waste is concrete with steel bars removed.

[0015] The water reducer is prepared by the following method: acc...

Embodiment

[0016] Embodiment: A concrete water-reducer for reuse of construction waste, the water-reducer comprises the following components by mass: nitrate: 12 parts; β-naphthalenesulfonate formaldehyde condensate: 14 parts; lignosulfonic acid Salt: 3 parts; dodecylbenzene sulfonate: 1.5 parts; the nitrate is a mixture of barium nitrate and lead nitrate, wherein 2 parts of barium nitrate and 10 parts of lead nitrate are formulated according to the above formula and mixed Ball mill for 3-5 minutes to form a powder with a particle size of <0.075mm; take the construction waste and crush it into the required granular shape; add the above two into the mixer, add an appropriate amount of water, and stir for 8 minutes.

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Abstract

The invention provides a water reducing agent for construction waste recycled concrete. The water reducing agent comprises the following components in parts by mass: 10-22 parts of nitrate, 12-22 parts of a beta-naphthalene sulfonate formaldehyde condensate, 2-5 parts of lignosulfonate and 0.5-2.5 parts of dodecylbenzene sulfonate. The nitrate is a mixture of barium nitrate and lead nitrate according to the ratio of 1.5-3 parts of barium nitrate and 8-20 parts of lead nitrate. The water reducing agent is powdery, and the particle size of the water reducing agent is less than 0.075 mm. The water reducing agent disclosed is high in water reducing rate and good in flowability, can improve the strength of concrete prepared from construction wastes, is suitable for various types of concrete prepared from construction wastes, and has good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of building materials, and relates to a water reducer, in particular to a water reducer for construction waste reused concrete. Background technique [0002] Construction waste refers to the solid waste generated during the construction, demolition and repair of various buildings and structures by construction units or individuals, and the process of residents' house decoration. In order to build a resource-saving and environment-friendly society, it is necessary to recycle construction waste from the fields of recycled aggregate, recycled concrete and mortar, and construction waste in road engineering; this utilization technology is construction waste resources Chemical recycling technology. Solid waste construction waste has excellent physical and mechanical properties and durability, and is a green building material that is energy-saving, waste-utilizing, and environmentally friendly. However, usually under the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/22C04B103/30
CPCC04B40/0042C04B2103/302C04B22/085C04B24/226C04B24/18C04B24/20
Inventor 黄文朝
Owner 徐州巨龙新材料科技有限公司