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

The invention discloses a mortar and concrete waterproofer. The waterproofer is characterized in that: the waterproofer comprises (part by weight) 70 to 90 parts of activation zeolite power, 0.3 to 2 parts of silane resin acceptor, 2 to 5 parts of stearic acid, 0.007 to 0.05 parts of alkylphenols polyethenoxy ether, 3 to 10 parts of magnesium lime, 1 to 6 parts of plaster, 5 to 10 parts of mekralon. The invention further relates to a preparation method for the mortar and concrete waterproofer. The waterproofer not only can increase the compactness, the pressive strength and the waterproof impermeability of the concrete, but also can prevent temperature difference gap through the delay and reduction of heat release of hydration, reduce the shrinkage of the cement gelatin to reduce the drying shrinkage of the concrete. A slight expansion of the concrete a compensation of a shrinking gap can increase the cracking resistance. The invention can also improve the operation performance of the mortar and the concrete, restrain an alkali-aggregate reaction and increase long term strength of the concrete and enhance the wear, and is particularly suited to serving as an admixture of the mortar and the concrete.

The invention discloses a production method of a canal groove side penetration prefabricated part. The production method comprises the steps that (1) a required mold with the same shape of a canal prefabricated part is manufactured, the mold is placed upside down, and concrete is poured from the bottom; (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 manufactured rebar skeleton is arranged in the pouring mold in a sleeving manner, and a concrete protection layer is adjusted; (4) concrete required by pouring is manufactured on site, concrete is poured into the mold, is uniformly flattened to the two ends, and is vibrated 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, side molds are disassembled after the time.temperature of maintenance is larger than 500 h.DEG C, an inner mold is disassembled after the time.temperature of watering maintenance is larger than 1500 h.DEG C, after mold disassembly, the prefabricated parts are stacked concentratedly, and the prefabricated parts are discharged and utilized after the time.temperature of maintenance is 2000 h.DEG C or above. The production method has the characteristic that construction efficiency can be greatly improved.

The invention provides a manufacturing method for ultrafine powder enhanced composite board. The manufacturing method is characterized in that a board having the characteristics similar to natural stone materials and elegant texture is prepared by mixing tree waste raw materials such as construction wastes, slag ultrafine powder and fly ash, a proper amount of magnesia, and a trace amount of boric oxide, water and cement. Since the slag ultrafine powder is obtained by grinding blast-furnace slag and has high specific surface area and high fineness, the slag ultrafine powder can be modified to be a potential self-gelating material. In an alkaline condition, activity can be fully played, so that a plurality of performances of concrete and cement are greatly improved and increased. The manufacturing method is an environment-friendly technology, and has wide sources of materials and low cost. The composite board has good use performance, low toxicity, moisture resistance, corrosion resistance and no pollution, integrates the advantages of ceramic and glass ceramics, has the advantages of no radiation, pollution resistance and corrosion resistance, and has relatively good processability.

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 an admixture for pump-transporting and lifting poured concrete in an arch rib steel pipe. The admixture is prepared from the following components in parts by weight: 30-50 parts of potassium sulphoaluminate, 10-30 parts of light calcined magnesia clinker, 10-30 parts of anhydrite, 10-30 parts of bentonite, 1-3 parts of alkylamine, 0.1-1 part of chitosan, 0.2-2 parts of a plastic gas former, 0.2-2 parts of fructo-oligosaccharide and 0.5-2 parts of silica. Compactness and strength of the concrete in the arch rib steel pipe during pouring by pump-transporting and lifting can be improved, the connection closeness between the steel pipe wall and concrete is improved, and cracking of the steel pipe wall and displacement of the steel pipe arch axis are avoided.

The invention specifically provides a low-alkali-content, environment-friendly and crack-resistant water repellent. The water repellent is prepared from the substances in mass ratio: calcined coal gangue, calcium oxide clinker, water glass waste residue, polyvinyl alcohol, desulfurized gypsum and stearic acid which are in the mass ratio of (40 to 50): (25 to 35): (10 to 15): (1.5 to 4.5): (10 to 15): (0.5 to 1.0). A preparation process for the low-alkali-content and crack-resistant water repellent comprises the steps of carrying out baking, carrying out crushing, carrying out grinding, carrying out subpackaging, carrying out sealing, carrying out quality testing and carrying out warehousing. The low-alkali-content and crack-resistant water repellent is synthesized through proportioning the waste coal gangue, the water glass waste residue and calcareous mineral powder and carrying out grinding. According to the low-alkali-content and crack-resistant water repellent and the preparation process therefor, the coal gangue and the water glass waste residue, which are extremely high in harmfulness and are refractory, are comprehensively utilized, so that the waste is changed into the valuable; and the low-alkali-content and crack-resistant water repellent has a variety of characteristics such as environmental protection and mineral resource reutilization, and good economic and social benefits are achieved.

The invention relates to a nanometer composite type expansion anti-cracking waterproofing agent. The nanometer composite type expansion anti-cracking waterproofing agent comprises the following components and contents: 9.2%-27.5% of calcium sulphoaluminate, 6.8%-11.2% of calcium aluminate, 7.1%-15.4% of calcium hydroxide, 4.8%-13.6% of PSP organic silicon powder, 3.6%-7.5% of sodium silicate, 0.1%-3.2% of ethanediamine sodium phosphate, 0.5%-2.5% of iron powder, 1.0-3.3% of borate, 0.1%-0.5% of manganese dioxide, 0.1%-2.4% of polypropylene fiber, 0.1%-0.8% of disodium ethylene diamine tetraacetate, 1.8%-4.3% of sodium tripolyphosphate, 15.2%-22.5% of pulverized fuel ash, 5.3%-11.6% of aminophenoxy naphthalene sulfonate and 5.1-8.5% of FP nanometer polymer. The expansion generated by the nanometer composite type expansion anti-cracking waterproofing agent and the contraction of concrete synchronously develop; and fillers generated by the nanometer composite type expansion anti-crackingwaterproofing agent can be used for effectively filling apertures of the concrete at different periods and different quantity values and under different action mechanisms of different crystal minerals. When the nanometer composite type expansion anti-cracking waterproofing agent is restrained by steel bars and adjacent positions, the 0.38MPa-0.8MPa prestressing stress can be generated; and different expansion mineral phases are generated at different ages of the concrete, thereby very effectively controlling the generation and development of non-structural cracks such as the early-stage plastic shrinkage and air shrinkage of the concrete and the cement plaster.

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 discloses a anticracking water proofer, which comprises the following steps: 1) allocating component and mass content as 60%-76% activatable zeolitic powder, 5%-15% silica ash, 3%-8% calcium oxide, 3%-8% magnesium oxide, 3%-8% anhydrous sodium sulfate, 2%-6% cement group osmosis crystallization masterbatch, 1. 0%-3. 0% silane coupling agent, 2%-4% high-strength high elasticity modulus polyethelene alcohol fibre and 5%-8% naphthalene system highly effective dehydragent; mixing the activatable zeolitic powder and the silane coupling agent; proceeding modified reaction; getting modified powder; 2) cooling the modified powder; adding into the silica ash, calcium oxide, magnesium oxide, anhydrous sodium sulfate, cement group osmosis crystallization masterbatch and naphthalene system highly effective dehydragent; mixing; getting mixture; 3) putting the mixture into zero gravity agitator; adding into high-strength high elasticity modulus polyethelene alcohol fibre; stirring to non-cluster. This invention possesses good dewatering property and high crack resistance.

The invention discloses a preparation process of a natrolite inorganic artificial stone. The process is characterized by: adding natrolite, aggregate, an early strength agent, sepiolite, lime, and hydroxymethyl cellulose into an industrial by-product, and stirring them evenly to obtain natrolite inorganic artificial stone precursor powder, adding water into the natrolite inorganic artificial stone precursor powder, stirring them uniformly, pouring the mixture into a die, and performing natural curing for 28d, thus obtaining the natrolite inorganic artificial stone, which has the characteristics of high early strength, no frosting, and no alkali-aggregate reaction.

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 a cement admixture for inhibiting alkali-aggregate reaction. The composition is as follows in parts by weight: 30-40 parts of waste glass powder, 15-20 parts of slag, 15-20 parts of slag, 3 parts of wool, 0.3-0.5 parts of gelatin, 3-5 parts of alkylbenzenesulfonate, 10-22 parts of lithium sulfate. After cleaning, airing and grinding waste glass bottles, mix them with slag and slag, and get the waste mixture through ball milling; mix the waste mixture with wool, alkylbenzene sulfonate, gelatin, and lithium sulfate evenly to obtain the inhibition Cement admixture for alkali-aggregate reaction. The invention has a simple preparation process, is convenient to use, has an obvious inhibitory effect on alkali aggregate reaction, is environmentally friendly, and the prepared concrete has excellent performance.