摘要:
The present invention relates to a hydraulic binder comprising: 25 to 60 % by mass of Portland clinker; 5 to 15 % by mass of a first mineral addition selected from: o mineral additions reacting with at least 400 mg/g of CaO according to the method at 90°C described in the NF P 18-513 Standard of December 30, 201 1, in Appendix A, and o latent hydraulic materials; a second mineral addition reacting with less than 400 mg/g of CaO according to the method described herein above; and either a third mineral addition with a base of calcium carbonate or calcium sulphate, or both; the hydraulic binder comprising at least 1 % by mass of reactive aluminium, which is to say that contributes to the development of strengths.
摘要:
To provide a high strength cement admixture which allows concrete to achieve steam-curing at an earlier stage because such concrete attains great initial strength development without retardation of setting even with use of a large amount of a high performance water reducing agent, and a process for producing a concrete product. A high strength cement admixture characterized by comprising a ground mixture of gypsum having a particle size of from 2,500 to 9,000 cm 2 /g as a Blaine specific surface area and glycerin, and preferably a silica material having a particle size of at least 5,000 cm 2 /g as a Blaine specific surface area and containing at least 60 mass% of SiO 2 , wherein the content of the glycerin is from 0.1 to 10 parts by mass per 100 parts by mass in total of the gypsum and the glycerin, and the content of the silica material is from 45 to 90 parts by mass, per 100 parts by mass in total of the gypsum, the silica material and the glycerin; and a process for producing a concrete product, characterized by blending the above high strength cement admixture, with cement, in an amount of from 2 to 15 parts by mass per 100 parts by mass in total of the cement and the high strength cement admixture.
摘要:
The invention generally relates to system and method for recovering sodium bicarbonate from a solid waste, and more particularly to a method and system for recovering sodium bicarbonate from fly ash of a coal fired plant collected downstream of an injection process for pollution reduction from the industrial process.
摘要:
The method according to the invention for producing a hydraulic binding agent by processing a silicate-containing component with components containing calcium silicate hydrate and/or larnite is characterized by the combination of the following two method steps: in the first method step, the silicate-containing component is comminuted in at least one comminution device to particle sizes of
摘要:
The present invention relates to a method for preparing an inorganic binding composition, including a geopolymer phase and a hydraulic phase essentially in the form of calcium silicate hydrate.
摘要:
A mortar contains cement, one or more than one mineral additive, superplasticizer, aggregates, a hydroxyethyl methyl cellulose and water, wherein the hydroxyethyl methyl cellulose is characterized by the sum of its hydroxyethyl molecular substitution and methyl degree of substitution is 1.90 or higher and 2.30 or lower and its viscosity as a 2 weight-percent aqueous solution that is below 30,000 milliPascals*seconds.