36results about How to "No rust effect" patented technology

The special admixture for self-compacting concrete is prepared by weight ratio of the following components: naphthalenesulfonate formaldehyde advanced condensate 7-16%, aluminum powder 0.01-0.22, anhydrite 40-65%, calcined kaolin 10-10% 25%, kaolin 10-25%, linear polymer anionic polysaccharide 0.02-0.09%, triterpene saponin 0.03-0.11%, sodium tripolyphosphate 0.5-1.5%. The invention has multiple functions of improving the rheology and volume stability of concrete, can significantly improve the slump retention capacity of self-compacting concrete, has micro-expansion characteristics, does not need to compound other materials after mixing, and can effectively improve the flow of concrete Denaturation, greatly reducing bleeding, avoiding segregation and delamination, basically no loss of fluidity for 5 hours, and can effectively compensate shrinkage in plastic and hardened states, and improve the volume stability of concrete. The invention has no corrosion effect on the steel, and is especially suitable for the construction of the steel pipe self-compacting concrete jacking method of the screw rod arch bridge.

The invention discloses a retarding and water reducing agent prepared by mixing the following raw materials in parts by weight: 35-45 parts of beta-naphthalene sulfonated formaldehyde condensates, 20-30 parts of sulfonated acetone-formaldehyde condensates, 10-15 parts of hydroxypropyl methyl cellulose, 6-12 parts of casein, 3-6 parts of mirabilite, 4-8 parts of sulfonated coal tar, 2-4 parts of borax, 5-10 parts of slaked lime, 8-14 parts of activated sludge, 5-10 parts of sodium fluosilicate, 2.5-4.5 parts of oil foot, 2-3 parts of tartaric acid, 3-5 parts of zinc molybdate, 4-6 parts of triethyl phosphate, 2-4 parts of maltodextrin, 4-8 parts of sodium methallyl sulfonate and 3-6 parts of auxiliary. The water reducing agent disclosed by the invention is good in retarding effect, good in adaptability to various kinds of cement, free of corrosion to reinforcing steel bars and capable of prolonging the setting time by 2-4h, achieving the water reducing rate of 15-20%, greatly improving the workability of concrete and improving various mechanical properties of the concrete, and can be used for various reinforced concrete works.

The invention relates to a water-based organic silicon waterproof agent by taking sodium methylsilanolate as a main raw material, and is particularly suitable for moving penetration waterproof processing of a porous structure, such as bricks, stone materials, concrete, mortar, cement slurry and the like.

The invention relate to a liquid early-strength and antifreezing type polycarboxylate compound water reducer without chlorine and a preparation method thereof. The water reducer is prepared with the following components in weight proportion: 6-12percent of early-strength type polycarboxylate water reducer, 4-10 percent of organic antifreezing component, 1.5-3 percent of organic early-strength component, 10-25 percent of inorganic early-strength catalyst, 0.3-0.5 percent of air-entrained component, and the rest is water. The preparation method is that every component is weighed according to the weight percentage of every component and then put into a reaction vessel and stirred slowly for 10-30 minutes. The addition of the invention is 0.5-1.5 percent of cementing material content, compared with the normal concrete; the water-reducing rate can amount to more than 20 percent, and the long-term strength of concrete is obviously increased. The liquid early-strength and antifreezing type polycarboxylate compound water reducer can be used for preparation of concrete with various strength grades from C20 to C80, has good antifreezing performance and can be used for the concrete constructed under circumstance with daily minimum temperature above 20 DEG C below zero.

The invention relates to a water-emulsion organic silicon waterproof agent by taking alkylalkoxy silane as a main raw material, and is particularly suitable for moving penetration waterproof processing of a porous structure, such as bricks, stone materials, concrete, mortar, cement slurry and the like.

The invention discloses a prestressing anchoring and grouting material additive, as well as a preparation method and an application thereof. The prestressing anchoring and grouting material additive comprises expansion components, active blending materials, crack resisting components, water reducing components and regulating components in definite proportions. The preparation method comprises the following steps of: (A) adding the expansion components, the active blending materials, the crack resisting components, the water reducing components and the regulating components in weight percentage to a ball grinding mill; (B) grinding for 10-30 min to be uniform at normal temperature and pressure to make Brinell specific surface area not less than 350 m<2> / kg to obtain the product. The invention has simple acquirement of raw materials, feasible method, easy and convenient operation, reasonable formulation and convenient use, overcomes the performance defects of a common cement based grouting material and the problems existing during use in the traditional prestressing anchoring engineering. The invention can effectively improve the workability of the anchoring and grouting material, can effectively increase slurry fluidity, greatly reduce sopreina and avoid segregation and delamination on the basis of ensuring the strength of cement slurry, and can effectively compensate shrinkage under the plastic hardening state so as to increase the volume stability of the cement slurry.