38results about How to "Meet pumping requirements" patented technology

The invention discloses a preparation method of fine aggregate in concrete, specially relating to a preparation method of machine-made sand fine aggregate. The method adopts sand preparing technology; when preparing machine-made sand fine aggregate, the machine-made sand is combined with special fine sand with smallest grain diameter to produce the machine-made sand fine aggregate with certain fineness modulus. The method overcomes the deficiency that in traditional technology, the fineness modulus of the machine-made sand fine aggregate can not be accurately regulated and controlled, and themethod of the invention can directly produce the machine-made sand fine aggregate satisfying premixed concrete pumping as well as construction and easy performance requirements.

The invention discloses a concrete composite water reducing agent which is prepared by mixing the following raw materials in parts by weight: 35 to 45 parts of para amino benzene sulfonate-sulfonated acetone-formaldehyde condensates, 25 to 35 parts of Beta-naphthalene sulfonate formaldehyde condensates, 15 to 20 parts of mahogany petroleum sulfonate, 10 to 15 parts of calcium lignosulphonate, 5 to 10 parts of triethanolamine, 8 to 14 parts of sulfonate-type waterborne polyurethane, 6 to 12 parts of zinc phosphate, 5 to 10 parts of ash calcium powder, 5 to 10 parts of polyvinylpyrrolidone, 3 to 6 parts of sodium metasilicate, 4 to 8 parts of coal residue, 3 to 6 parts of triterpenoid saponin, 2 to 4 parts of allylthiourea, 2.5 to 4.5 parts of rhamnolipid, 2 to 3 parts of isooctyl triethoxy silane and 4 to 7 parts of auxiliaries. The adding amount of the water reducing agent is low, i.e., the adding amount of the water reducing agent only accounts for 0.4% to 0.8% of the mass of concrete. The water-reducing rate of the water reducing agent can reach up to 20% to 25%. The water reducing agent has a good plasticizing effect, so that the slump of the concrete is obviously increased, and the cohesiveness and the workability of the concrete are improved, wherein the slump of the concrete can be increased by above 180mm, thereby conforming to the requirement of concrete pumping.

The invention discloses a barite anti-radiation pumping concrete. The mixing ratio of the concrete according to the weight part is: cement: water: barite powder: barite sand: barite: synergist: admixture = [340 ~450]: [110~170]: [75~150]: [1000~1400]: [1800~2000]: [2~4]: [7~19]. Through the selection of raw materials and the design of the ratio, a radiation-resistant concrete with high density and good fluidity that can be used for pumping is obtained.

The invention discloses a permeable concrete and a construction process thereof. Stones, cement, sand, silicon powder, water, and a water reducing agent are used as aggregates of the permeable concrete. The construction process is as follows: pre-construction preparation-weighing raw materials-raw material mixing- Transportation-spreading, flat vibration-surface cleaning-seam treatment-construction completed; using the above scheme, the average relative density of permeable concrete of the present invention is 2169Kg / m3, the compressive strength is greater than 35MPa, and the water permeability coefficient of concrete pavement is greater than 1mm / s, the slump can reach more than 120mm, which can meet the pumping requirements when necessary; at the same time, due to the use of aggregates with large particle size and wide application range and the control of silicon rate, the cost is low. This construction process is suitable for permeable concrete pavement , squares, parking lots and other constructions can increase the water permeability of urban pavement while meeting the structural requirements, adjust the urban microclimate and maintain ecological balance.

The invention relates to fully recycled regenerated glass fiber reinforced plastic reinforced concrete and a preparation method thereof, wherein the concrete comprises the components in parts by weight: 14.4 to 17.6 parts of ordinary Portland cement, 2.7 to 3.3 parts of fly ash, 0.9 to 1.1 parts of silica fume, 31.6 to 36.5 parts of a fine aggregate, 47.34 to 57.86 parts of a coarse aggregate, 2.1to 4.9 parts of regenerated glass fiber reinforced plastic, 1.35 to 1.85 parts of a water reducing agent, and 9 to 9.27 parts of water. The regenerated glass fiber reinforced plastic comprises regenerated fibers and glass fiber reinforced plastic powder, the content of the glass fiber reinforced plastic powder is not more than 20%, the length of the regenerated fibers is not larger than 10 mm, and the particle size of the glass fiber reinforced plastic powder is not more than 1 mm. The concrete realizes full recycling of the regenerated glass fiber reinforced plastic, has high working performance, meets the pumping requirement, and has good ductility while the strength meets the standard requirement. The concrete solves the problems of shortage of sandstone material resources, limited glass fiber reinforced plastic waste recycling way and low utilization rate, and is beneficial to promoting the practical engineering application of glass fiber reinforced plastic solid wastes in building materials.

The invention discloses a configuration method of a low-shear strength grouting material for a shield excavation gap, which comprises the following steps: selecting a grouting material; preliminary designing multiple groups of grouting materials with different water-cement ratios and multiple groups of different swelling ratios ; Make multiple groups of grouting material specimens; test the shear strength of each group of specimens to obtain the optimal water-cement ratio and optimal swelling ratio of the grouting material; add bentonite and water to the mixer according to the optimal swelling ratio Stir inside to make it fully mixed evenly, and then let it stand to make it fully expanded; measure the water glass with the required Baume degree, add it to the expanded bentonite slurry, and stir evenly; add cement powder, continue to stir evenly, and configure Finish. The invention studies the filling problem of the excavation gap in shield construction, and can solve the problem that the conventional shield grouting material locks the shield; adopts a new filling material configuration method to meet the pumping requirements in the grouting equipment, At the same time, it has high shear strength.

The invention relates to an Al2O3-SiO2-SiC-based refractory material, in particular to an Al2O3-SiO2-SiC-based jet material for wet jet construction of a foundry ladle. The Al2O3-SiO2-SiC-based jet material for the foundry ladle comprises the following components in percentage by weight: 45 to 65 percent of sintered mullite, 5 to 15 percent of SiC, 7 to 18 percent of brown aluminium oxide or special-grade alumina, 5 to 10 percent of Al2O3 super-micro powder, 4 to 8 percent of high-aluminum micro powder, 2 to 5 percent of silicon micro powder, 1.5 to 3 percent of calcium aluminate cement, and 6 percent of balance. The granularity of the Al2O3 super-micro powder is leas than or equal to 2 microns; the purity of Al2O3 in the high-aluminum micro powder is more than or equal to 88 percent, and the granularity is less than or equal to 5 microns; and the purity of SiO2 in the silicon micro powder is more than or equal to 92 percent, and the granularity is less than 1 micron. The balance comprises 3 percent of andalusite and 3 percent of cyanite. The jet material has high strength and good thermal shock stability and corrosion resistance, and ensures good self-flowing property and pumping property.

The invention discloses a dirty oil floated oily sludge dewatering treatment method, and belongs to the technical field of petroleum waste residue treatment. According to the dirty oil floated oily sludge dewatering treatment method, biosurfactant rhamnolipid is added into dirty oil floated oily sludge continuously for dewatering, wherein adding amount of rhamnolipid is controlled to be 400 to 1000ppm, dewatering temperature is controlled to be 45 to 60 DEG C, pH value is adjusted to 4 to 5, rhamnolipid is uniformed mixed with the dirty oil floated oily sludge via stirring, and an obtained mixture is allowed to stand for 10min to 5h, so that solid floated oily sludge and oil float upwards, and a lower layer is a relatively clear water layer; after demulsification treatment of the dirty oil floated oily sludge with rhamnolipid, dewatering rate is higher than 60 to 70%, obtained concentrated floated oily sludge still possesses excellent fluidity, requirements of pumping are satiasfied, the floated oily sludge is subjected to coking treatment to avoid discharge of the floated oily sludge; processing cost is reduced, environmental protection benefits are achieved, and environment pollution on surrounding areas is reduced.