CN102390939A

CN102390939A - Concrete interface composite binder

Info

Publication number: CN102390939A
Application number: CN2011102190914A
Authority: CN
Inventors: 顾宗法
Original assignee: ZHANGJIAGANG YIDA CEMENT CONCRETE ADMIXTURE CO Ltd
Current assignee: ZHANGJIAGANG YIDA CEMENT CONCRETE ADMIXTURE CO Ltd
Priority date: 2011-08-02
Filing date: 2011-08-02
Publication date: 2012-03-28

Abstract

The invention relates to a concrete interface composite binder. The concrete interface composite binder is mainly composed of: silicon powder, fly ash, slag powder, dioctyl phthalate, a low-alkali expanding agent, and methyl cellulose. The concrete interface composite binder provided by the invention has good mechanical properties. When the binder is applied in interface binding of novel and old concrete or mortar, interface tensile strength and shear strength of the novel and old concrete can be improved. Also, the binder is advantaged in easy construction, low price, no toxicity, and no pollution.

Description

A kind of concrete interface compound binding agent

Technical field

The present invention relates to a kind of concrete interface compound binding agent, belong to the construction project field.

Background technology

In recent years; Along with process of urbanization, urban-rural integration construction are constantly accelerated, road construction develops rapidly, no matter is new construction; Still adhesion problem that is new to all running in the maintenance and reinforcement of building engineering, old concrete, comprehensive reinforcing of common making or bridge floor like bridge deck; The problem that a series of civil engineering works such as the repairing of Broken Plate of Cement Concrete Pavement all relate to newly, can old concrete integrated; The Mechanics Performance of Adherence of New face has become the weakest in a building structural member aspect, and the road that occurs in the construction work on it, bridge fine fisssure and slit have become a big problem of safety of structure and weather resistance.

A large amount of engineering practice and theoretical analysis result show, influence is new, old concrete agglutinating factor is a lot, but mainly is: New-old concrete shrink differ, the performance of proportioning content, sticker itself etc. becomes Mechanics Performance of Adherence of New quality most important reason.

At present, the weld crete of supplying on the market is various in style, has some defectives in actual use: the one, though bond effect is better, and poor durability; The 2nd, to the bad adaptability of concrete repair face, be prone to cause New-old concrete to be difficult to combine, influence the engineering normal construction.

Summary of the invention

The technical problem that the present invention will solve is to overcome above-mentioned existing defective, and a kind of concrete interface compound binding agent is provided.

The present invention realizes through following technical scheme, it is characterized in that mainly by: its this concrete interface compound binding agent mainly by: silica flour 10%～30%, flyash 5%～20%, slag powders 5%～20%, DOP 10%～15%, low alkali swelling agent 9%～15%, methylcellulose gum 2%～8% are formed.

The fineness of its silica flour is that 0.13 μ m～0.15 μ, loss on ignition are less than 2.0%～3.0%; The flyash water demand ratio is 90%～95%, SiO ₂, AL ₂O ₃, Fe ₂O ₃Total content should be greater than more than 90%; The specific surface area of slag powders should be greater than 5000cm ²/ g.

Its technological process is: silica flour is ground to 0.13 μ m～0.15 μ m, after, stir by a certain percentage with flyash, slag powders, DOP, low alkali swelling agent, methylcellulose gum and to be mixed evenly, be packaged into bag and get final product.

Embodiment

Get 30% silica flour, it is ground to 0.13 μ m～0.15 μ m, it is 2.0%～3.0% subsequent use that loss on ignition is controlled at; Select 20% flyash, water yield ratio is 90%～95%, SiO ₂, AL ₂O ₃, Fe ₂O ₃Total content should be greater than more than 90%; 10% slag powders, specific surface area should be greater than 5000cm ²/ g; DOP 15%; Low alkali swelling agent 15%; Methylcellulose gum 10% stirring is mixed even, is packaged into bag and gets final product.

During use, cement consumption is greater than 300kg/m ³, add the concrete interface compound binding agent and blunge to certain denseness by 100:1.5.

This concrete interface compound binding agent has the good mechanical performance, and the interface bonding that is applied to new, old concrete or mortar can improve interface tensile strength and shear strength new, old concrete, and easy construction, low price, nontoxic pollution-free.

Claims

1. concrete interface compound binding agent is characterized in that: this concrete interface compound binding agent mainly by: silica flour 10%～30%, flyash 5%～20%, slag powders 5%～20%, DOP 10%～15%, low alkali swelling agent 9%～15%, methylcellulose gum 2%～8% are formed.

2. according to right 1 described a kind of concrete interface compound binding agent, the fineness of its silica flour is that 0.13 μ m～0.15 μ, loss on ignition are less than 2.0%～3.0%; The flyash water demand ratio is 90%～95%, SiO ₂, AL ₂O ₃, Fe ₂O ₃Total content should be greater than more than 90%; The specific surface area of slag powders should be greater than 5000cm ²/ g.