5results about How to "Promote cementation" patented technology

The invention discloses a cold cementing negative carbon aggregate prepared by synergistically using steel slag and coal-based solid waste and a preparation method of the cold cementing negative carbon aggregate, and belongs to the technical field of solid waste resource utilization. The cold cementation negative carbon aggregate comprises steel slag, coal-based solid waste, an activating agent, a grinding aid and a pore-forming agent. The steel slag and the coal-based solid waste are effectively utilized, high energy consumption and high pollution caused by a traditional sintering mode are avoided, the purposes of energy conservation and environmental protection are achieved, and the cold-cemented negative carbon aggregate is light in weight, high in strength, simple in preparation process, suitable for industrial application and popularization, capable of serving as building light aggregate or building sand-gravel materials and suitable for popularization and application. The method has excellent environmental benefits, economic benefits and social benefits.

This invention discloses a geopolymer-modified grouting material and its preparation method. The invention utilizes a composite activator and modifier to disrupt, depolymerize, and repolymerize the structure of coal gangue, fully activating it and giving it strong cementitious properties. This results in a geopolymer-modified grouting material with a three-dimensional network structure. The mass ratio of coal gangue powder: desulfurized gypsum powder: microsilica powder: composite activator: modifier = 100:8:5:5:3. The test data of the prepared geopolymer-modified grouting material for water control and foundation grouting are as follows: The grout was prepared with a water-cement ratio of 1:1, and its properties were measured as follows: fluidity 260 mm; stone formation rate 99.8%; initial setting time 990 min, final setting time 2112 min; 3-day plastic strength 1211.6 kPa; 7-day compressive strength 8.82 MPa; free expansion rate 0.3%.

The invention discloses a method for repairing a rock slope of a mine by utilizing microorganisms, and belongs to the field of ecological restoration of slopes. According to the method, cultured bacterial liquid is sprayed on an ecological slope protection base material on a side slope through an irrigation system, the ecological slope protection base material is reinforced, and the ecological restoration work of the rock side slope is completed. According to the method, the calcium carbonate is prepared by utilizing microorganisms, the utilized microorganisms are rich in resource, efficient in reaction, environment-friendly and pollution-free, and the solid waste alkaline residues are used as a calcium source, so that resource reutilization is realized, the environmental protection pressure is greatly reduced, and the microorganisms make a greater breakthrough in the field of slope restoration.

The invention discloses a cement plug plugging method under an oil-based drilling fluid condition and cement paste, and the method comprises the following steps: a drilling tool is put down to a well bottom or a leakage layer, and a pre-positioned spacer fluid is pumped at a first preset pumping displacement; cement paste is pumped with the second preset pump injection displacement; if the front spacer fluid flows out of the water hole of the drilling tool and starts to return upwards by a first preset height, drilling is conducted by one stand column height without stopping the pump; pumping the rear spacer fluid at a third preset pumping displacement; the drilling tool is kept immobile, and the drilling fluid is pumped with the fourth preset pumping displacement; judging whether the preposed spacer fluid flows out of the water hole of the drilling tool and begins to upwards return to the annulus or not; if yes, after the front spacer fluid upwards returns to the first preset height, the drill is pulled out by the height of one stand column without stopping the pump; if not, pulling out the hole to a second preset height above the cement surface; well closing and squeezing injection are conducted, and spacer fluid arranged in front of the bottom of the cement paste and cement paste with the sixth preset volume are squeezed into the leakage stratum; and according to the determined initial setting time of the cement paste, well shut-in squeezing injection is conducted with the preset squeezing injection displacement, and the total squeezing injection amount of the cement paste is determined.

The invention relates to the technical field of cement paste, in particular to a nano styrene-butadiene latex flexibilizer and a preparation method thereof, and further comprises high-temperature-resistant and carbon dioxide corrosion-resistant cement paste and a preparation method thereof. The nano styrene-butadiene latex flexibilizer is prepared by the following steps: firstly, preparing a temperature-resistant monomer pre-emulsion and a toughening monomer pre-emulsion in advance; adding a part of the temperature-resistant monomer pre-emulsion and a part of the toughening monomer pre-emulsion into the molecular weight regulator solution to obtain emulsion seeds, then adding the balance of the temperature-resistant monomer pre-emulsion, the balance of the toughening monomer pre-emulsion and an initiator into the emulsion seeds for reaction, and finally, obtaining the temperature-resistant and toughening-type emulsion composite material. And washing, drying and crushing the obtained reaction product to obtain the nano styrene-butadiene latex flexibilizer. The high-temperature-resistant carbon-dioxide-corrosion-resistant cement paste can improve the strength of the first cementing surface and the second cementing surface of a well cementation cement sheath, reduce the permeability of set cement and prevent carbon dioxide from eroding the set cement.