40results about How to "Inhibition of alkali-aggregate reaction" patented technology

The invention discloses C70 mass concrete. The C70 mass concrete is prepared from the following components by mass: 140 to 170 parts of water, 400 to 450 parts of cement, 1,000 to 1,200 parts of crushed stone, 550 to 650 parts of gravel, 70 to 110 parts of coal ash, 60 to 90 parts of mineral powder, 30 to 70 parts of silica fume, 8 to 10 parts of a pumping agent, 35 to 45 parts of an anti-crackingagent, and 0.3 to 0.4 part of an internal curing agent. The invention also discloses a preparation method for the C70 mass concrete. The method comprises a first step of uniformly mixing sand, graveland water and a second step of adding other components and carrying out uniform mixing under stirring. According to the composition of the mass concrete in the invention, mineral powder, silica fumeand fly ash are used as mineral admixtures and can delay the release rate of cement hydration heat and reduce the shrinkage and deformation of the concrete, and the mineral admixtures acts synergistically with the other components to inhibit the generation of cracks at the same time; and the preparation method of the invention is simple in process and easy to implement.

The invention discloses high-durability concrete for a road. The concrete is prepared from Portland cement, coarse sand, medium-coarse sand, gravel, water, coal ash powder, blast furnace slag, glass bead, natural zeolite ultrafine powder, steel slag, aluminum oxide powder, sodium molybdate, sodium chromate, sodium thiosulfate, triethanolamine, a maleic anhydride water reducing agent, an air entraining agent and mixed fiber. The high-durability concrete for the road is high in mechanical property, not prone to cracking and high in durability such as impermeability, corrosion resistance and freezing resistance on the basis of ensuring strength and greatly prolongs the service life of the road.

The invention relates to a method for producing a concrete channel prefabricated part from mineral slag. The method is characterized in that the concrete channel prefabricated part is prepared from the following raw materials in parts by weight: 60-70 parts of fine and coarse aggregate, 10-20 parts of 42.5 sulfoaluminate cement, 5-10 parts of fly ash, 5-10 parts of slag micropowder, 1-3 parts of early-strength admixture, 1-3 parts of high efficiency water reducing agent and 0.1-0.5 part of defoaming agent. The high efficiency water reducing agent is a calcium lignosulphonate water reducing agent. The concrete channel prefabricated part has the advantages of low cost, excellent properties, stable quality, excellent compression strength, excellent compression strength, excellent freeze resistance and excellent water impermeability. The method aims to further enhance the standard construction of irrigation projects, comprehensively enhance the construction level and management and protection level of agricultural hydraulic engineering in China, increase the utilization ratio of irrigation water and implement high-efficiency utilization of water resources.

The invention relates to an early strength concrete with a super retarding effect, and a preparation process thereof, and relates to the technical field of concrete preparation. The early strength concrete is prepared from, by weight, 180-200 parts of ordinary Portland cement, 1180-1220 parts of coarse aggregate, 600-640 parts of fine aggregate, 240-260 parts of an active admixture, 6-10 parts ofa polycarboxylate superplasticizer, 8-12 parts of a super retarder, 4-8 parts of an early strength agent and 180-200 parts of water. Addition of the super retarder and the early strength agent prolongs the initial setting time of the concrete and improves the early strength of the concrete.

The activity excitant for flyash as cementing material may be used to make the flyash adding amount as high as 70 % without affecting the early strength of cement and concrete. The activity excitant consists of iron powder in 20-50 wt%, calcium oxide in 20-40 wt%, densifying agent 0.05-0.5 wt% and flyash 10-40 wt%, and is added into cement and concrete in the amount of 1-3 % of cementing material. The production process includes air drying and sieving iron powder, milling calcium oxide to obtain calcium oxide powder, and mixing the said material in the said ratio.

The invention discloses a technology for producing slag micro powder and application of the slag micro powder in cement production. The cement comprises the following raw materials in part by weight: 25 to 30 parts of slag micro powder, 45 to 55 parts of clinker, 3 to 8 parts of desulfurized gypsum, 5 to 10 parts of coal gangue, and 5 to 10 parts of fly ash. The technology is low in investment and quick in response, a large quantity of blast furnace slag can be digested, and the produced cement product has excellent performance. When the slag micro powder is applied to common cement concrete, the consumption of the cement can be reduced, and the cost of the concrete is reduced.

The invention relates to high-strength anti-crack concrete and a preparation process thereof. The high-strength anti-crack concrete is prepared from the following raw materials in parts by weight: 180-200 parts of ordinary Portland cement; 1180-1220 parts of coarse aggregate; 600-640 parts of fine aggregate; 200-240 parts of an active admixture; 8-12 parts of a polycarboxylate superplasticizer; 30-50 parts of fiber filler; 4-8 parts of a slow-release alkaline agent; 180-200 parts of water. The fiber filler is added to toughen the concrete, so that the anti-cracking effect and strength of the concrete are improved.

The invention discloses a cement admixture for inhibiting alkali-aggregate reaction. The cement admixture comprises the following components in parts by weight: 30-40 parts of waste glass powder, 15-20 parts of furnace slag, 15-20 parts of mineral slag, 3 parts of wool, 0.3-0.5 part of gelatin, 3-5 parts of alkyl benzene sulfonate sulfate and 10-22 parts of lithium sulfate. The method comprises the following steps: cleaning, airing and grinding waste glass bottles, mixing the waste glass bottles with furnace slag and mineral slag, and performing ball milling to obtain a waste mixture; and uniformly mixing the waste mixture with wool, alkylbenzene sulfonate sulfate, gelatin and lithium sulfate to obtain the cement admixture capable of inhibiting the alkali-aggregate reaction. The preparation process is simple, the use is convenient, the inhibition effect on the alkali aggregate reaction is obvious, the green and environment-friendly effects are realized, and the prepared concrete has excellent performance.

The invention discloses a C70 self-compacting concrete and a preparation method thereof, and relates to the technical field of concretes. The C70 self-compacting concrete is prepared from, by weight,370 to 390 parts of cement, 800 to 815 parts of sand, 890 to 910 parts of broken stone, 90 to 110 parts of fly ash, 100 to 120 parts of mineral powder, 35 to 50 parts of silicon powder, 12 to 18 partsof a high-efficiency water reducing agent, 0.2 to 0.5 part of an air entraining agent, 0.1 to 0.6 part of a defoaming agent microcapsule and 150 to 165 parts of water. The preparation method comprises the following steps: 1, uniformly stirring and mixing the broken stone, the sand, the cement, the fly ash, the mineral powder and the silicon powder to obtain a first mixture; 2, uniformly mixing water, a superplasticizer and an air entraining agent, adding the obtained mixture into the first mixture, and uniformly stirring to obtain a second mixture; and 3, adding the defoaming agent microcapsule into the second mixture, and stirring for 13-17 S to obtain the C70 self-compacting concrete. The preparation method has the advantages of ensuring the flowability of the concrete and improving thestrength of the concrete, and the preparation method is simple and easy to implement.

The invention discloses a production method of water channel groove prefabricated members. The production method comprises the following steps that (1) a pouring die needed by the water channel prefabricated members in same shapes is manufactured, the die is inversely placed, and the bottom of the die is upward; (2) the inner side of the die is evenly coated with mold oil, or a plastic thin film is paved on the inner side of the die; (3) a manufactured reinforcement cage is arranged in the pouring die in a sleeved manner, and a concrete protection layer is adjusted well; (4) concrete needed by pouring is manufactured on site, wherein the concrete is poured in from the middle of the bottom of the die and is evenly spread to the two ends, a tamping device is used for vibrating for 1 minute to 3 minutes, then the upper surface of a groove opening of the die is troweled, and a die cover plate is closed; and (5) the water channel prefabricated members obtained after concrete pouring are maintained on site, during maintenance, edge dies can be detached after the time.temperature is larger than 500 h.DEG C, during watering maintenance, an inner die can be detached after the time.temperature is larger than 1500 h.DEG C, the prefabticated members are stacked in a concentrated manner after the inner die is detached, and during maintenance, factory leaving for use can be achieved after the time.temperature is larger than 2000 h.DEG C. The production method has the beneficial effect that the construction efficiency can be greatly improved.

The invention discloses a production method of a canal tee prefabricated part. The production method comprises the steps that (1) a required pouring mold with the corresponding shape of the canal tee prefabricated part is designed; (2) the inner side of the mold is uniformly smeared with demolding oil or a plastic film is put on the inner side of the mold; (3) a mold cavity is fixed, side wall molds sleeve the mold cavity, end cover molds at the two ends are mounted, and a rebar structure which strengthens the canal corner strength is put and is arranged on the mold cavity in a sleeving manner; (4) concrete required by pouring is manufactured on site, concrete is poured into the mold from the middle of the bottom of the mold, vibration is carried out for 1 min to 3 min through a vibrator, the upper surface of the mold is finished, and a mold cover plate is closed; and (5) the canal prefabricated parts subjected to concrete pouring are maintained on site, the side molds of the mold are disassembled after the time.temperature of maintenance is larger than 500 h.DEG C, the mold cavity is disassembled after the time.temperature of watering maintenance is larger than 1500 h.DEG C, after the mold cavity is disassembled, the prefabricated parts are stacked concentratedly, and the prefabricated parts are discharged and utilized after time.temperature of maintenance is larger than 2000 h.DEG C. The production method has the characteristic that construction efficiency can be greatly improved.

The invention relates to the technical field of concrete, in particular to anti-cracking concrete and a preparation method thereof. The anti-cracking concrete is prepared by stirring and mixing the following raw materials in parts by mass: 32-36 kg of cement, 24-28 kg of aggregate, 50-60 kg of water, 10-15 kg of fly ash and 10-15 kg of acrylic acid through. The raw materials can be used for preparing concrete and have the advantage of improving the strength of the concrete. In addition, the preparation method disclosed by the invention has the advantage of improving the permeability resistanceof the concrete.

The invention relates to lightweight concrete external walls and discloses a lightweight composite concrete external wall and a production method. The lightweight composite concrete external wall comprises a steel bar bracket, an embedded part fixed in the steel bar bracket, a concrete matrix which is used for filling and cladding the steel bar bracket and a coating layer which is coated on the outer side of the concrete matrix; the lightweight composite concrete external wall is prepared from the following raw materials in parts by mass: 100 parts of portland cement, 100 parts of water, 80 parts of crushed stone aggregate, 8 to 12 parts of strongly acidic action exchange resin, 30 to 40 parts of natural sand and 7 to 10 parts of polytetrafluoroethylene filler. The production method comprises the following steps: pouring lightweight composite concrete obtained by mixing the raw materials into an external wall mold provided with the steel bar bracket and the embedded part; after the lightweight composite concrete is solidified and cured, obtaining the concrete matrix; coating the concrete matrix with a coating layer, so as to obtain the lightweight composite concrete external wall.The carrying load of an external wall fixing bracket is reduced, and the compression resistance and bending strength of the lightweight composite concrete are improved; the possibility that the external wall is fractured or crushed when being impacted is reduced.

The invention discloses an additive capable of inhibiting the whiskering of a non-metal material product and a preparation method and application thereof, and belongs to the technical field of inorganic non-metal materials. Because the additive contains industrial salt and is prepared through blending, drying, grinding, inspection and packaging, the additive can be used for inhibiting the phenomena of alkali-aggregate reaction of a concrete product and whiskering of a gypsum product. The additive disclosed by the invention is extensive in raw material, simple in preparation method, low in cost and extensively used for an overpass, a road, a building or a gypsum product industry, and can be used for greatly prolonging the service life of the concrete product, enhancing the radiation resistance and prolonging the coagulation time when used for the concrete product, thereby being convenient for modern concrete construction; in addition, the additive disclosed by the invention can be used for greatly enhancing the whiteness and strength of the gypsum product when used for the gypsum product.

The invention relates to a cementing material for inhibiting metamorphic rock alkali aggregate reaction and a preparation method thereof. The cementing material comprises the following components: cement, silica fume, phosphorus slag powder, waste glass powder, fly ash, an early strength activator and an AZK auxiliary agent according to a mass ratio of (400-620): (50-100): (90-105): (75-250): (89-193): (3.0-5.0): (7.0-10.0). The cementing material for inhibiting metamorphic rock alkali aggregate reaction is developed through a creative synergistic effect of a cementing material compounding technology, a cementing material secondary hydration process control technology and a cementing material excitation technology, the performance of inhibiting metamorphic rock alkali aggregate reaction is excellent, the comprehensive utilization of industrial wastes such as silica fume, fly ash, phosphorus slag powder and waste glass powder is further enhanced, and the cementing material is green and environment-friendly.