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

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 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.