7 results about "Superplasticizer" patented technology

The invention discloses C50 high performance concrete prepared from a fully-recycled fine aggregate, the C50 high performance concrete includes the following components: a binding material, a coarse aggregate, a fine aggregate, a water reducing agent and water, wherein the fine aggregate is the fully-recycled fine aggregate, the amount of binding material is 400-430kg / m<3>, the water-binder ratio is 0.33-0.35, the sand rate is 38%-40%, and the amount of the coarse aggregate and the amount of the fully-recycled fine aggregate are calculated according to volume method, and the water reducing agent neat dosage is 0.3 to 0.5% of the dosage of the binding material. The C50 high performance concrete breaks through the problem of low strength of recycled aggregate concrete, micro powder in the fully-recycled fine aggregate is effectively used for filling aggregate voids, the dosage of the binding material can be reduced by 20kg-80kg in each cubic meter of concrete, environment is protected, and cost is saved.

The invention discloses a coating material for sealing the coal wall of a gob-side coal roadway. The coating material comprises 100 parts of cement, 3-6 parts of an environmentally-friendly interfacepolymer solid material and 10-15 parts of a mineral mixture and other additives, the environmentally-friendly interface polymer solid material comprises, by mass, 100 parts of an acrylate polymer solid and 8-9 parts of polyethylene synthetic resin, and the mineral mixture and other additives comprise, by mass, 5-10 parts of silica fume, 10-15 parts of common fly ash or slag, 1-2 parts of a superplasticizer and trace parts of basalt chopped fibers. The coating material is a novel composite material for guniting, and meets the requirements for plugging the coal wall of the gob-side coal roadway.

The invention discloses a concrete high-efficiency water reducer. The water reducer comprises the following raw materials in parts by weight: 20-40 parts of unsaturated alcohol-polyoxyethylene ether,10-30 parts of sodium lignin sulfonate, 10-20 parts of acrylic acid, 5-10 parts of modified starch, 3-8 parts of aloe gel, 2-6 parts of cyclodextrin, 2-5 parts of cross-linked povidone, 2-5 parts of zinc gluconate, 1-3 parts of sodium polystyrenesulfonate, 1-3 parts of sodium alginate, 0.5-2 parts of graphene oxide, 0.2-1 part of sodium silicate, 0.1-0.5 part of a defoaming agent and 3-5 parts ofan initiator. The high-efficiency water reducer prepared by the method is good in stability, and can increase workability of concrete when used in the concrete. In addition, the water reducer can be mixed with other water reducing agents for use, the water adding amount is reduced, the solidification time of concrete is shortened, and strength of the concrete is improved.

The invention relates to the technical field of preparation of a modified naphthalene-based superplasticizer, in particular to a method for preparing the modified naphthalene-based superplasticizer from heavy fraction obtained in production process of ethyl alcohol. The method includes the steps of firstly, adding crude naphthalene into a four-neck flask, heating until crude naphthalene is moltencompletely, stirring while adding industrial concentrated sulfuric acid dropwise, and then holding the temperature and detecting the pH value; secondly, cooling to a certain temperature, replenishinga proper quantity of water according to the pH value, performing hydrolysis, after that, adding rectified heavy fraction with stirring; thirdly, adding formaldehyde solution dropwise after finishing stirring, holding the temperature for a while, and then adding alkali liquor slowly to regulate the pH value. The method solves the problems of complex recovery, treatment difficulty, high energy consumption, high cost and the like of heavy fraction generated in the rectification of ethyl alcohol. In the process of condensation, the naphthalene-based superplasticizer is grafted, number and type ofbranches of the naphthalene-based superplasticizer are both increased, and water-reducing rate of concrete can be increased while slump effect can be improved.

The invention discloses a mud-resistant early-strength enhanced polycarboxylate superplasticizer and a preparation method thereof. The preparation method comprises the steps that acrylic acid, a mud-resistant monomer 1 and deionized water are mixed to be uniform, and a solution A is obtained; uniformly mixing a reducing agent and the deionized water to obtain a solution B; uniformly mixing an early strength agent, a reinforcing agent and the deionized water to obtain a solution C; and adding polyether, a mud-resistant monomer 2 and the deionized water into a reactor with a stirring function, adding an initiator, uniformly mixing the materials, dropwise adding the solution A and the solution B, supplementing water, dropwise adding the solution C at a constant speed, and uniformly mixing, thereby obtaining the mud-resistant early-strength enhanced polycarboxylate superplasticizer. According to the mud-resistant early-strength enhanced polycarboxylate superplasticizer and the preparationmethod thereof, the mud-resistant early-strength enhanced polycarboxylate superplasticizer is used for concrete production, workability such as workability, wrapping performance and pumpability of concrete can be excellent, and the early strength and the later strength of the concrete are improved.

The invention relates to the technical field of concrete admixtures, in particular to an esterification product for preparing a water reducing agent, a preparation method of the esterification product, a high-workability polycarboxylic acid water reducing agent and a preparation method of the high-workability polycarboxylic acid water reducing agent, and the esterification product for preparing the water reducing agent is excessive unsaturated carboxylic acid and/or unsaturated carboxylic acid anhydride. According to the esterification product for preparing the water reducing agent, the main chain of the polycarboxylic acid water reducing agent is provided with phenoxyethanol and/or phenoxyisopropanol, fumarate and maleate structural units, the polycarboxylic acid water reducing agent with corrosion resistance is obtained, and the corrosion resistance of the polycarboxylic acid water reducing agent is improved. The polycarboxylate superplasticizer prepared by the preparation method does not need to be compounded with a small-molecular preservative, so that the problem of uneven distribution caused by poor compatibility of the preservative and the polycarboxylate superplasticizer does not exist, and the final product is a stable macromolecular structure, so that the polycarboxylate superplasticizer can tolerate high temperature higher than 50 DEG C, and the high-temperature corrosion resistance is more excellent.