82results about How to "High structural density" patented technology

The invention discloses a concrete viscosity regulator suitable for compatible use with a polycarboxylic acid water reducer and a preparation method thereof; the concrete viscosity regulator comprises the components by the weight percentage: 0.1%-10% of a clay stabilizer, 0.01%-5% of an air-entraining agent, 0.001%-5% of a foam stabilizer, 0.001-10% of a thickener, and 75%-99% of water. The preparation method comprises the steps: firstly, adding water to a stirrer, fully mixing evenly other components, starting up the stirrer, after running smoothly, slowly adding the materials, and thus obtaining the concrete viscosity regulator when the materials are fully dissolved and stirred evenly. With cooperative use of the prepared viscosity regulator with the polycarboxylic acid water reducer, the polycarboxylic acid water reducer can be promoted to be adsorbed on cement particle surfaces to form a water film lubrication layer, a cement slurry steric-hinerance effect and rheological properties (the cement slurry has low plastic viscosity and higher yield stress) are effectively increased, wrapping performance on aggregates is increased while the viscosity of the concrete slurry is reduced, and thus the concrete construction performance is improved.

The invention relates to a diamond resin wheel and a mold and a method for machining the resin wheel. The resin wheel comprises a base body and abrasive material layers, wherein the abrasive layers are at least two abrasive layers which are fixed on the surface or the outer circle of a base body through extrusion and hot pressing, and each abrasive layer is formed by mixing and pressing differentcoarse and thin diamond particles and a binding agent; and the bonding position of the abrasive material layers and the base body are adopted with a dovetail-type structure, and the bonding faces arefurther processed into rough surfaces; the mold comprises a positioning base, a mold frame and a center mold, wherein the inner wall of the mold frame and the bottom face of the center mold form a placement area of the diamond resin wheel base body, a gap for installing a pressure head is arranged between the inner wall of the mold frame and the outer wall of the center mold, and the center mold is assembled with an assembling rod in a fixed mode through a fastening nut to be limited; the method for machining the resin wheel comprises the following steps that 1) the resin wheel base body is prepared; 2) the base body is fixed; 3) the abrasive material layers are pressed in advance; 4) hot-pressing forming is carried out; and 5) shaping and manufacturing are carried out. According to the method, a specially designed mold and a machining mode are adopted, so that the resin wheel with multiple utilization can be produced, and the grinding efficiency is improved.