Additive for concrete and mortar
阅读：454发布：2023-05-20
专利汇可以提供Additive for concrete and mortar专利检索，专利查询，专利分析的服务。并且The invention relates to an additive or mixture for improving the workability and strength and reducing the air content of inorganic binder, and especially hydraulic cement-containing compositions such as concrete and mortar. The additive comprises sulphite waste liquor and certain polyalkylene glycols and their derivatives. The invention also relates to the binder-containing compositions comprising the additive and methods of making the same.，下面是Additive for concrete and mortar专利的具体信息内容。
2. The additive of claim 1 in which the polyalkylene glycol is a polyethylene glycol having a molecular weight of from 1,000 to 10,000.
3. The additive of claim 1 in wHich the polyalkylene glycol is a polypropylene glycol having a molecular weight of from 134 to 5, 800.
4. The additive of claim 1, characterized in that the sulphite waste liquor is in solid form.
5. A method of making, shaping and hardening a cementitious mixture containing an inorganic binding agent which comprises incorporating in the inorganic binding agent a filler, water, and an amount of an additive consisting essentially of (1) an amount within the range from about 0.01 to about 2 parts by weight of sulfite waste liquor on a dry basis and (2) an amount within the range from about 0.001 to about 1 part by weight of a polyalkylene compound selected from the group consisting of polyalkylene glycols, and ethers and esters thereof which is at least partially soluble in water and which in a 1 percent aqueous solution has a surface tension of more than 50 dynes/cm at 25* C. to provide an amount of sulfite waste liquor on a dry basis within the range from about 0.01 to about 2 percent by dry weight of the inorganic binding agent, and an amount of the polyalkylene glycol or ether or ester thereof within the range from about 0.01 to about 1 percent based on the dry weight of the inorganic binding agent, and shaping the mixture and permitting it to harden.
6. A method of making concrete containing Portland cement as the essential inorganic binding agent which comprises incorporating in the cement, sand, aggregate and water, and an amount of an additive consisting essentially of (1) an amount within the range from about 0.01 to about 2 parts by weight of sulfite waste liquor on a dry basis and (2) an amount within the range from about 0.001 to about 1 part by weight of a polyalkylene compound selected from the group consisting of polyalkylene glycols, and ethers and esters thereof which is at least partially soluble in water and which in a 1 percent aqueous solution has a surface tension of more than 50 dynes/cm at 25* C. to provide an amount of sulfite waste liquor on a dry basis within the range from about 0.01 to about 2 percent by dry weight of the inorganic binding agent, and an amount of the polyalkylene glycol or ether or ester thereof within the range from about 0.01 to about 1 percent based on the dry weight of the inorganic binding agent, and shaping the mixture and permitting it to harden.
7. Mortar containing an inorganic binding agent, a filler, water, and an additive consisting essentially of (1) an amount within the range from about 0.01 to about 2 parts by weight of sulfite waste liquor on a dry basis and (2) an amount within the range from about 0.001 to about 1 part by weight of a polyalkylene compound selected from the group consisting of polyalkylene glycols, and ethers and esters thereof which is at least partially soluble in water and which in a 1 percent aqueous solution has a surface tension of more than 50 dynes/cm at 25* C.
8. Concrete containing Portland cement as the essential binding agent, sand, aggregate, water, and an additive consisting essentially of (1) an amount within the range from about 0.01 to about 2 parts by weight of sulfite waste liquor on a dry basis and (2) an amount within the range from about 0.001 to about 1 part by weight of a polyalkylene compound selected from the group consisting of polyalkylene glycols, and ethers and esters thereof which is at least partially soluble in water and which in a 1 percent aqueous solution has a surface tension of more than 50 dynes/cm at 25* C.
9. Concrete containing an inorganic binding agent, a filler, water, and an additive consisting essentially of (1) an amount within the range from about 0/ 01 to about 2 parts by weight of sulfite waste liquor on a dry basis and (2) an amount within the range from about 0.001 to about 1 part by weight of a polyalkylene compound selected from the group consisting of polyalkylene glycols, and ethers and esters thereof which is at least partially soluble in water and which in a 1 percent aqueous solution has a surface tension of more than 50 dynes/cm at 25* C.
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