31results about How to "Speed ​​up the hydration reaction" patented technology

The invention discloses a kind of method of testing the concrete erosion-chloride resisting ability. It is characterized in that: concluding the follow steps: A. makes the concrete material after hot curing at 60-90deg.C as the test piece and at time of hot curing the weight ratio of the water and the jelling material is 0.28-0.54; B. after hot curing the concrete assays the value of flux and chloride ion diffusion coefficient individually; C. accords the formula Qstandard=M+NQhot to impute the value of concrete flux with the standard curing and in the formula Qstandard is the value of concrete flux with the standard curing and the Qhot is the flux measured at step B and the M,N are constants; D. accords the formula Destandard=M1+N1Dehot to calculate the chloride ion diffusion coefficient of standard curing concrete and in the formula Destandard is the value of chloride ion diffusion coefficient of standard curing concrete and the Dehot is the chloride ion diffusion coefficient measured at step B and the M1,N1 are constants. The method of the invention can test the concrete erosion-chloride resisting ability quickly.

The invention discloses controllable clay and cement seepage-proof reinforcement paste. The controllable clay and cement seepage-proof reinforcement paste is mainly prepared from clay raw stock, cement and water, wherein the clay raw stock is mainly obtained by stirring clay and water. A modifier is added in the controllable clay and cement seepage-proof reinforcement paste; the doping amount of the modifier is 1 to 3 percent; the modifier mainly comprises mineral additives, sulfate and bentonite in a mass ratio of a:b:c; and a:b:c is 5:(5-0):(0-5). The product has the advantages of high stability and water flow dilution resistance, controllable setting time, adjustable strength, high antiseepage performance, low cost, environment friendliness and the like.

The invention relates to a high early strength type polycarboxylate water reducer for metro segment concrete. The water reducer is prepared from the following raw materials by weight percent: 30-50% of early strength type polycarboxylate water reducer mother liquor, 3-10% of water reducing excitant, 5-15% of early strength excitant, 0.05-0.5% of de-foaming agent, 2-10% of active catalyst, 0.05-0.5% of thixotropic agent and 20-59% of water. The invention aims to utilize the synergistic effect of the high early strength type polycarboxylate water reducer for metro segment concrete to various regulation techniques, such as, high dispersion, low air bleeding, high reaction speed and high reaction degree of concrete to promote the early strength of the concrete and meanwhile to shorten the setting time of the concrete and properly reduce the gas content of the concrete. The high early strength type polycarboxylate water reducer is especially suitable for the preparation of segment prefabricated concrete. The quick promotion of the early strength and the quick shortening of the settling time are both beneficial to the reducing of the de-molding time of the prefabricated concrete part and the increasing of the template turnover efficiency, so that the production efficiency of the prefabricated part is increased.

The invention discloses a method for preparing non-burning bricks from offshore drilling waste mud. The steps are as follows: S1. Solid-liquid separation is performed on the offshore drilling waste mud, and the solid phase is dehydrated by pressure filtration to obtain a filter cake; S2. The filter cake is passed through drying, crushing, ball milling, and washing to remove chloride ions to obtain the base material; S3, adding cement, gypsum, polyvinyl alcohol, and aggregates to the base material, mixing evenly to obtain a mixture, adding water to the mixture to obtain a semi-dry aggregates; aggregates include coarse aggregates and fine aggregates; coarse aggregates are crushed pebbles, the particle size distribution is between 5mm and 10mm, and the bulk density is 1663kg / m 3 ; The fine aggregate is river sand with a fineness modulus of 2.4. S4. The semi-dry mixture is made into adobe, and after the adobe is demoulded, it is naturally cured for 28 days to obtain an unfired brick. The preparation method of the invention realizes the problems of safe and environment-friendly disposal and resource comprehensive utilization of the waste mud from offshore drilling.

The invention belongs to the field of machinery manufacturing technology and provides a natural curing production line for building blocks. The natural curing production line for the building blocks comprises a block making machine, a palletizing machine, a conveying car, a ferry car and a solar curing room in order. The ferry car is arranged on longitudinal rails. Transverse rails for a bearing car to move along are arranged on the conveying car, on the ferry car and in the solar curing room. The ferry car comprises a master car and a subsidiary car which is arranged on the master car. A hydraulic propulsion device used for pushing and pulling the subsidiary car to move laterally is arranged on the master car. At least two sets of movable pushing plates are arranged on the subsidiary car. The bearing car can pass through the pushing plates in order and the pushing plates push the bearing car to move forward after the bearing car passes through the pushing plates. The invention further provides a production method for the building blocks using the natural curing production line for the building blocks. The natural curing production line for building blocks is skillful in design, and reasonable in structure, conforms to the production requirements of the building blocks, and solves the technical problems that in the prior art the design of the production line is complicated, the equipment is more, the cost is high, the occupied area is larger, the working efficiency is unsatisfactory and the curing mode is unreasonable.

The invention discloses a special grinding aid for phosphogypsum cement and a preparation method thereof, belonging to the technical field of cement admixtures. The grinding aid of the present invention is prepared from the following raw materials in parts by weight: 10-30 parts of alcohol amine grinding aid components, 40-70 parts of calcium silicate hydrate seed crystals, 0.5-2 parts of thickening dispersant, Foam agent 0.1-0.5 part, water 20-40 part. The present invention uses the prepared hydrated calcium silicate crystal seed as a substance to induce cement hydration, shortens the induction period in the cement hydration process, and improves the hydration reaction speed; at the same time, it can also adsorb water-soluble phosphorus-containing compounds in phosphogypsum, thereby Accelerate cement hydration and reduce the impact of phosphorus-containing impurities in phosphogypsum on cement hydration. The invention also introduces alcohol amine grinding aid components, and the synergistic effect of each substance can alleviate the problems such as the later strength reduction caused by the phosphogypsum impurities to a certain extent. The product provided by the invention is in the form of liquid, and has many advantages such as simple use and convenient transportation.