阅读说明：本技术 不烧手的速凝剂配方及生产工艺 (Formula and production process of non-burning accelerator ) 是由 张自翔 计文清 张振群 于 2019-09-04 设计创作，主要内容包括：本发明涉及喷射混凝土用速凝剂制造配方及生产工艺,技术核心是：制造pH值在5～9范围的偏酸或偏碱的近似中性的速凝剂产品,为克服现有强碱、强酸性产品烧手和腐蚀机械的缺陷,提供制造新型速凝剂产品实用技术。产品制造工艺简单、设备投资小,亦可浓缩制成膏状或粉剂产品。若在喷射混凝土施工地配制,能免去50％以上的水运输费。实施后具备突出的实用性和经济效益,特别是运输、包装成本降低和安全施工、节能降耗等项收效显著。(The invention relates to a manufacturing formula and a production process of an accelerator for sprayed concrete, which has the technical core that: the method is used for preparing the approximately neutral accelerator with the pH value of 5-9 of the partial acid or partial alkali, and provides a practical technology for preparing a novel accelerator product for overcoming the defects of hand burning and mechanical corrosion of the existing strong alkali and strong acid products. The product has simple manufacturing process and small equipment investment, and can also be concentrated into paste or powder products. If the concrete is prepared in a sprayed concrete construction site, more than 50% of water transportation cost can be saved. After the construction, the method has outstanding practicability and economic benefits, and particularly has obvious effects on reducing transportation and packaging costs, safe construction, saving energy, reducing consumption and the like.)

1. The method for preparing the approximately neutral setting accelerator product of the partial acid or the partial alkali with the pH value of 5-9 is characterized by comprising the following formula and production process scheme:

the scheme is characterized in that the formula comprises the following raw materials in proportion: 70-60% of water, 15-30% of aluminum sulfate, 4-10% of fluosilicic acid or hydrofluoric acid, 5-10% of alkaline substances, and mixing with high-speed stirring and emulsifying equipment. The scheme II adopts the following raw materials and formula proportion: 70-50% of water, 20-40% of polyaluminium sulfate (pH value is more than or equal to 5) and 10% of organic amine activator are mixed at normal temperature and normal pressure, and the coagulation accelerating time is adjusted.

2. The alkaline substance used in the scheme (1) comprises: sodium aluminate, magnesium oxide, organic amines, or a mixture of two or more thereof, which is not limited to liquid or powder products.

3. The proposal of claim 1, the alkalization degree of the polyaluminium sulfate is more than or equal to 25, and the polyaluminium sulfate does not contain sodium ions; the activator is organic amine high molecular polymer (code SDGXH).

4. The chemical raw material of claim 1 is not limited to the use of genuine products, by-products and wastes, and the material ratio is calculated by one hundred percent.

Technical Field

The invention relates to a formula and a production process of an accelerator (hereinafter referred to as accelerator) for sprayed concrete, belonging to the field of novel environment-friendly building materials in fine chemical engineering.

Background

The production raw materials of the prior accelerating agent comprise sodium aluminate and silicate, which have strong alkalinity, powder and aqueous products, and acid and strong aqueous products which take sulfate and fluoride as main components. When the two types of accelerating agent products are used, the skin and hands of an operator are greatly damaged, and the accelerating agent is commonly called as: burning hands; meanwhile, strong acid and alkali products also have great mechanical corrosion on sprayed concrete, and sodium ion-containing strong alkali products are easy to generate alkali aggregate reaction on the concrete, so that the later stage of the strength of the concrete is reduced. Therefore, the development of a low-alkali and alkali-free accelerator product without burning hands has wide social benefits.

Disclosure of Invention

The invention provides a manufacturing formula and a production process of a meta-acid or meta-alkali approximately neutral accelerator product with a pH value of 5-9, aiming at overcoming the defects of hand burning and mechanical corrosion of the existing strong-base and strong-acid accelerator products.

In order to solve the defect problems, the invention adopts sulfate, fluorine silicate and aluminate, magnesium and organic ammonium alkaline substances for polymerization and neutralization, and the raw material formula proportion and the process scheme are as follows:

the formula of the suspension liquid is 70-60% of water, 15-30% of aluminum sulfate, 4-10% of fluosilicic acid or hydrofluoric acid and 5-10% of alkaline substances; the process comprises the steps of mixing the first three raw materials at normal temperature and normal pressure, adjusting the pH value to be 5-9 by using an alkaline substance, and mixing by adopting high-speed stirring and emulsifying equipment for improving the stability of the product.

The solution formula comprises 70-50% of water, 20-40% of polyaluminium sulfate (the pH value is more than or equal to 5) and about 10% of an activating agent; the process is that the two raw materials are mixed at normal temperature and normal pressure, and then the activator is used for adjusting the coagulation accelerating time.

Detailed Description

The technical core of the invention is as follows: the method is used for preparing the approximately neutral accelerator with the pH value of 5-9 of the partial acid or partial alkali, and provides a practical technology for preparing a novel accelerator product for overcoming the defects of hand burning and mechanical corrosion of the existing strong alkali and strong acid products.

The invention has simple technical process and small equipment investment, and can also be concentrated to prepare paste or powder products. If the concrete is prepared in a sprayed concrete construction site, more than 50% of water transportation cost can be saved. After the construction, the method has outstanding practicability and economic benefits, and particularly has obvious effects on reducing transportation and packaging costs, safe construction, saving energy, reducing consumption and the like.