40results about How to "Durability impact" patented technology

The invention provides a super-gelled material based on a wet grinding process and its preparation method and application. The super-gelled material based on a wet-milled process consists of 28% to 60% cement, 1% to 3% Surface modifying agent, 0.1-0.2% stabilizer and 37%-70% water are prepared through wet grinding process. The super-cemented material based on the wet grinding process of the present invention uses ordinary Portland cement as the main raw material, and is processed through the wet grinding process, and in the wet grinding process, a surface modifier and a stabilizer are added to obtain a median particle size of 2-5μm super-cemented material, because after the wet grinding process, the whole system is in a "pre-hydration" state, and due to the finer particle size, the super-cemented material of the present invention has higher hydration than the original cement degree and extremely high activity, when part of the cement is replaced, the early strength can be significantly improved, and the gradation can be optimized, so that the later strength can also be improved to a certain extent. Among them, the 12h strength increase ratio can reach 142%.

The invention relates to an adsorbent for mud in a concrete aggregate. The adsorbent is prepared by uniform mixing of the following components by weight: 15-20% of unsaturated polyether, 5-10% of polyethylene glycol, 2-3% of phosphate, 2-3% of water glass, and the balance water. The adsorbent provided by the invention can be adsorbed on mud in the concrete aggregate prior to a polycarboxylate superplasticizer, can avoid losing water reduction, slump retention and other efficacy due to adsorption of the polycarboxylate superplasticizer by soil, reduces the concrete slump time losing, ensures the mechanical performance, durability and other requirements of concrete, and is conducive to smooth construction.

A composite cloth, comprising a cloth body and at least one functional film. The cloth body includes two opposite first surfaces and a second surface, and the cloth body has a plurality of micropores passing through the first surface and the second surface. The at least one functional film is bonded to the first surface of the cloth by vacuum pressing, and the at least one functional film is recessed toward the micropores to form a plurality of recesses respectively accommodated in the micropores. Inlets, and each concave portion is connected to the periphery of the hole defining the corresponding micropore. Wherein, the at least one functional film has functional components, so that the region of the composite cloth having the at least one functional film has a specific function.

The invention belongs to the technical field of building materials, particularly relating to high-calcium fly ash concrete. The high-calcium fly ash concrete comprises the following raw materials by weight in per cubic meter of concrete: 144-175 kg of mixing water, 224-480 kg of cement, 35-135 kg of high-calcium fly ash, 1007-1120 kg of gravels, 671-804 kg of sand, 1.7-9 kg of water reducing agents, 0-110 kg of low-calcium fly ash and 0-110 kg of slag powder, wherein the mixing water is temporary hardwater, and the concentration of HCO3<-> in the mixing water is greater than 300 mg / L. The concrete has the characteristics of easy production and high operability, the high-calcium fly ash resource can be fully utilized, and the poor stability is eliminated.

The invention belongs to the technical field of building materials and relates to a slag additive and its preparation method and use. The slag additive comprises, by weight, 5-50% of glycol, 5-30% of diglycol, 10-50% of glycerol, 10-50% of lithium sulfate, 0.1-5% of sodium sulfate, 0.1-5% of sodium sulfocyanate, 1-10% of sodium hydroxide and 15-95% of water. A use ratio of the slag additive in slag is in a range of 0.1-0.5%. The slag additive can improve slag seven-day activity by 10-15% and slag 28-day activity by 5-10%.

An underground energy storage device arranged in an underground diaphragm wall comprises an air compressor, gas storage steel pipe tail sections, main gas storage steel pipes, continuous gas storage steel pipe sections and oblique gas storage steel pipe sections, wherein the two ends of each continuous gas storage steel pipe section are connected with the corresponding oblique gas storage steel pipe section and the corresponding gas storage steel pipe tail section respectively to form an independent gas storage steel pipe unit; one independent gas storage steel pipe unit is pre-buried in each of the two sides of each underground diaphragm wall unit; the two oblique gas storage steel pipe sections inside each underground diaphragm wall unit are connected with the first main gas storage steel pipe; the two gas storage steel pipe tail sections inside each underground diaphragm wall unit are connected with the second main gas storage steel pipe; the air compressor is arranged at one end of the first main gas storage steel pipe; one end of the second main gas storage steel pipe is an air outlet pipeline. By the adoption of the structure, the space inside the underground diaphragm wall is fully utilized, a compressed air energy storage system is formed without affecting the stability of the underground diaphragm wall, and the functions of cool supply, heat supply, pressure potential energy power generation and deformation detection of the underground diaphragm wall are achieved.

The invention belongs to the technical field of bridge construction materials, and in particular relates to a bridge post-tensioning prestressed tunnel press grout and a preparation method thereof, which is characterized in that the press grout is composed of Portland cement clinker, mineral powder and a grout agent , the proportioning of Portland cement clinker, mineral powder, grouting agent is: Portland cement clinker 55% ~ 85%, mineral powder 5% ~ 25%, grouting agent 5% ~ 25% . The above-mentioned bridge post-tensioned prestressed channel grouting material has a simple process. The key is that it does not contain gypsum, fly ash, volcanic ash and light substances in the grouting agent. During the pressure stabilization period and the hardening period, there will be no laitance at the highest point of the curved pipe, and the strength is high. When the grout is recharged, it will not cause delamination after the grout is hardened after the second repressurization, which can effectively prevent the prestressed steel hinge. Corrosion and breakage of wires have a major impact on the safety and durability of bridge structures, and are of great significance for widespread promotion.