Energy-efficient and environment-friendly fresh ready-mix concrete improving agent

Abstract

The invention discloses an energy-efficient and environment-friendly fresh ready-mix concrete improving agent, comprising the following components: organic alcohol, a stabilizer, a polyvinyl alcohol and / polyvinyl chloride, a dispersant and water, and also comprising a thickening agent. The improving agent disclosed by the invention is applied to fresh ready-mix concrete, so that free water of an aggregate surface can be reduced, the binding power of set cement and aggregate is increased, the strength and the lasting quality of the concrete are improved, and the service life is prolonged. Meanwhile, the grade strength of the concrete is kept and the construction workability is improved on the basis that the economic benefit targets of reducing the dosage of a water reducer and saving a cementing material are achieved, and the targets of saving energy and protecting environment are achieved.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to an energy-saving and environment-friendly fresh concrete improver. Background technique [0002] Concrete is a building material that uses cement-based cementitious materials, aggregates such as sand and stone, and water (with or without admixtures and admixtures) in a certain proportion, and is stirred and hardened to form a building material. Concrete is widely used in modern industrial and civil buildings, and has become the basic material for building modern society. Almost every aspect of modern human society involves the use of concrete. From ancient times to the present, concrete has a common mission as a building structure material, which is to prolong the service life of buildings as much as possible, that is, to exert the durability of concrete. [0003] Studies have shown that during the preparation of fresh concrete, due to the action of endogenous water a...

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Problems solved by technology

[0005] Naphthalene-based water-reducers and polycarboxylate-based water-reducers, which are widely used in concrete production, have played an important role in overcoming the defects of concrete cement stone-aggregate bonding surface, improving concrete strength and reducing water-cement ratio, but still It cannot effectively solve the objective defects in the interface transition zone between cement stone and aggregate in concrete

Naphthalene-based water-reducing agent is a representative of the second-generation water-reducing agent. It is characterized by water-reducing, strengthening, strong adaptability to different cements, and moderate price. It is widely used in concrete engineering, but its water-reducing rate is low and slump loss Large, fresh concrete is prone to rapid coagulation, bleeding, delamination, strength reduction and other unstable quality phenomena during transportation and pouring

As a new generation of concrete water reducer, polycarboxylate water reducer has high sensitivity problems of adaptability, sensitivity, and compatibility with cementitious materials, and fresh concrete often has rapid setting, slowing down, and slowing down during transportation and pouring. Unstable quality phenomena such as coagulation, bleeding, delamination, rapid slump loss, many bubbles, and reduced strength

[0006] In summary, based on the structural defects in the transition zone of the concrete interface and the unstable quality of concrete after the use of water reducing agents, it is urgent to develop new admixtures to improve the construction performance and durability of concrete

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