5results about How to "Reduce drying shrinkage" patented technology

The present application relates to the technical field of aerated concrete preparation, and particularly relates to a method for preparing electrically conductive aerated concrete by using porous carbonized recycled aggregate and the aerated concrete. The process method first places pre-wetted recycled aggregate in a pressurized carbonization kettle, and industrial waste gas with CO2 concentration greater than or equal to 20% is introduced to react for 2-3 hours at 0.5-0.7 MPa and 60-70 DEG C to produce porous carbonized recycled aggregate. Then the porous carbonized recycled aggregate is dry-mixed with gel material, gypsum, conductive carbon black and reinforcing fibers, and then mixing water containing water reducing agent (water aggregate ratio 55-60%) is added to stir into base mortar. Then aluminum paste suspension is added to the mortar, and after stirring to start aeration, the mortar is poured into a mold. After 2-3 hours of static aeration, the mold is finally autoclaved and dried for 6-8 hours to obtain the electrically conductive aerated concrete. Through aggregate pretreatment strengthening, orderly dispersion of the conductive phase and hierarchical curing control, the present application can effectively solve the contradiction between light weight, high strength, electrical conductivity and durability, and provide a multifunctional green building material solution for airport construction.

The invention discloses lightweight thermal insulation concrete as well as a preparation method and application thereof, and belongs to the technical field of lightweight thermal insulation materials. The concrete comprises cement, fly ash, expanded perlite, polystyrene foam particles, a water reducing agent, a functional foaming liquid, a foam stabilizer, cellulose ether and water. Wherein the functional foaming liquid is formed by compounding sodium dodecyl benzene sulfonate, terephthalic acid, sodium carboxymethyl cellulose and tannic acid, and the foam stabilizer is composed of dodecanol and decyl glucoside according to the mass ratio of 1: 1. According to the invention, a nanotube network is formed in situ on a bubble interface through the functional foaming liquid, and the synergistic foam stabilizing effect of the composite foam stabilizer is combined, so that the foam stability is remarkably improved, and the pore structure of a hardened body is optimized. The obtained concrete has the advantages of low density, low heat conductivity coefficient, high compressive strength, excellent freeze-thaw resistance, chloride ion permeation resistance, carbonization resistance and durability, and is suitable for building non-bearing wall self-insulation systems, roof insulation layers and fireproof isolation belts.

The invention discloses fiber polymer titanium gypsum mortar and a preparation method thereof. The fiber polymer titanium gypsum mortar is prepared from the following raw materials in parts by weight: 40 to 60 parts of titanium gypsum, 40 to 60 parts of sand, 10 to 15 parts of alkaline additive, 0.5 to 1 part of sodium sulfate, 2 to 3 parts of quick lime, 0.1 to 3 parts of plant fiber, 1 to 2 parts of cellulose ether, 0.2 to 2 parts of water reducing agent, 1 to 5 parts of redispersible latex powder and 0.1 to 2 parts of retarder. The doped plant fiber raw material is wide in source, so that the impermeability and the crack resistance of the gypsum mortar are effectively improved, and meanwhile, the construction performance is improved. The titanium gypsum is only dried and does not need to be calcined, certain additives and plant fibers are added, the high-water-resistance gypsum mortar with the titanium gypsum as a main cementing material is obtained, an energy-saving and environment-friendly product with good mechanical properties is provided, and meanwhile the high-water-resistance gypsum mortar has the advantages of being low in production cost, wide in raw material source and good in water resistance.

The application discloses a kind of gradient hierarchical utilization garbage incineration bottom ash preparation's zero clinker ultra-high performance concrete and its preparation method, including following weight parts raw materials: garbage incineration bottom ash 660-700 parts;Mineral powder 460-500 parts;Silica fume 35-45 parts;Fine quartz sand 380-420 parts;Activator 370-380 parts;Modifier 15-17 parts;Steel fiber 110-130 parts.Garbage incineration bottom ash includes following particle size and weight parts garbage incineration bottom ash: 8 μm below garbage incineration bottom ash 35-45 parts;8-40 μm garbage incineration bottom ash 75-85 parts;40-150 μm garbage incineration bottom ash 150-170 parts;150-500 μm garbage incineration bottom ash 380-420 parts.The application cooperates and utilizes garbage incineration bottom ash, mineral powder and silica fume, and does not use Portland cement as UHPC cementing material raw material, and UHPC preparation cost and carbon emission are greatly reduced.

The application provides a preparation method of a solidifying agent based on a full-solid waste saline soil, which comprises the following steps: respectively measuring the content of SO4 2‑ and Cl ‑ in saline soil and mixture A, respectively calculating the mixing amount of mixture A and mixture B in the saline soil, obtaining the mass of required alkali residue and carbide slag according to the mixing ratio of mixture A and mixture B in the saline soil, respectively adding mixture A, mixture B and water into a stirring machine to obtain a solidifying agent of solidified saline soil by stirring, and respectively adding the solidifying agent and the saline soil into a stirring machine container to obtain solidified saline soil. The solidifying agent formed by the synergistic excitation system of salt-alkali is used to excite slag and steel slag, so that the saline soil is reinforced, and the saline soil has higher strength when the mixing amount of the solidifying agent accounts for 25% to 35% of the mass of the saline soil.