105results about How to "Improve setting time" patented technology

In a method of making a gypsum slurry, a polycarboxylate dispersant, a modifier and a hydraulic material comprising stucco are selected for use in the slurry. These components are then combined with water to form a slurry, where the modifier is added to the slurry prior to formation of a slurry phase by the water, the stucco and the dispersant. The modifier has been shown to be less effective when added after the dispersant and stucco have been contacted in an aqueous slurry. In a preferred embodiment, an amount of stucco is obtained and the modifier and dispersant are selected. A predissolved solution of a dispersant and modifier is prepared in water to form a solution prior to the addition of the stucco. After mixing the solution, the stucco is added to form the slurry. Optionally, the slurry is then shaped into a product and allowed to set.

The present invention is related to adhesive compositions and their applications. In particular, the adhesive compositions described herein comprise a two or more propylene-based copolymers with varying comonomer content.

Effective use of dispersants in wallboard containing foam results from a method where stucco is mixed with a first dispersant and a first quantity of water to form a gypsum slurry. A soap is blended with a second dispersant and a second quantity of water to make a foam. Subsequently, the foam is combined with the slurry. Choice of different first and second dispersants and their relative amounts allows control of the size distribution of the foam bubbles in the slurry and the resulting voids in the gypsum core. Use of the same dispersant in both the mixer and the foam water provides a boost in efficacy of the dispersant.

A dry mix cement composition including an alkaline multi-phase aluminosilicate material, wherein the alkaline multi-phase aluminosilicate material provides a source of alkaline and soluble silicate to the cement composition.

The invention discloses a multifunctional expandable fiber anti-cracking waterproof agent. The multifunctional expandable fiber anti-cracking waterproof agent comprises the following components in parts by weight: 8-27.3 parts of calcium sulphoaluminate, 4-9 parts of calcium oxide, 5-9 parts of magnesium oxide, 14.7-23.5 parts of fly ash, 4-9 parts of an iron powder expanding agent, 1.5-7.8 partsof a modified sepiolite fabric, 1-4.5 parts of modified polypropylene fibers, 1.5-4 parts of sodium methyl silicate, 0.5-1.5 parts of sodium fluosilicate and 1-4 parts of a polycarboxylic acid effective water reducing agent, wherein the modified sepiolite fabric is modified through diluted hydrochloric acid and a silane coupling agent, the modified polypropylene fibers are modified through potassium dichromate, concentrated sulfuric acid and a silane coupling agent, thus, mutually cross-linked net-shaped structures are formed in concrete, compared with an existing anti-cracking waterproof agent which takes common sepiolite, sepiolite fibers and polypropylene fibers as raw materials, the anti-cracking waterproof agent is better in anti-cracking property and expanding property, shorter in time of coagulation and higher in concrete performance. The invention further provides a preparation method of the anti-cracking waterproof agent, and the raw materials are blended by a two-step method.

A cementitious armor panel assembly including cementitious armor panel with ballistic and blast resistant properties attached to a frame structure to produce a protective structure. The cementitious armor panels have a continuous phase resulting from the curing of an aqueous mixture of an inorganic cement binder, an inorganic mineral filler having a particle size of about 150-450 microns, a pozzolanic mineral filler, a polycarboxylate based superplasticizer self-leveling agent, and water. The mixture may also contain alkanolamine, and acid or acid salt. Prior to curing, the continuous phase is reinforced with fiber uniformly distributed in the continuous phase before it is cured to form the panel. The panel may be reinforced with a skin attached to at least one surface of the panel.

The invention discloses an alkali-free chloride-free sulfate-free liquid accelerator applicable to a sulfate corrosion environment. The liquid accelerator is composed of aluminum dihydrogen phosphate,an organic alcohol amine coagulating component, an inorganic fluorine-containing coagulating component, an alkali thickening rheological agent component, an antifreeze agent component and water. Theliquid accelerator disclosed by the invention does not contain sodium, potassium, chlorine and sulfate, has an excellent coagulating effect, is short in coagulation time during construction, high in strength and low in resilience rate, has excellent low-temperature storage and application functions, and is particularly suitable for application of sprayed concrete and stoppage and rush-repair engineering in inland and coastal sulfate environments.

The invention relates to a sulfo-aluminous clinker with optimal setting time and short term compressive strengths, comprising a mixture of the following phases: —calcium sulfoaluminate, or C4A3$, in amounts higher than 50% by weight of the mixture, —belite, or C25, in amounts between 2 and 23%, —3C25 3C$ CaX2, X being fluorine or chlorine, between 3 and 15% —C11A7CaX2, X being fluorine or chlorine, between 2 and 12%, both fluorine and chlorine being altogether present in the mixture, and phase C5S2$ being absent. The invention also relates to a method for preparing this sulfo-aluminous clinker, and hydraulic binders comprising this clinker.

The invention relates to a strontium-barium cement calcination composite mineralizer, which is mainly made of strontium slag and barium slag, wherein both the weight percentage of the strontium slag and the weight percentage of the barium slag are 15 to 85 percent; the strontium slag is waste residue for producing strontium carbonate, and the weight percentage of SrO is required to be 25 to 40 percent; and the barium slag is waste residue for producing barium carbonate, and the weight percentage of BaO is required to be 20 to 50 percent. The invention utilizes the strontium slag and the barium slag as raw materials to synthesize the composite mineralizer, and achieves the aims of improving the cement strength, accelerating the hydrating and hardening of cement, improving the yield of kilns, reducing the cement cost, saving energy and resources, and reducing environmental pollution through the activation and mineralization of the composite mineralizer during the calcination of cement clinker.

A method of regulating a setting time of a bone filler material, the method comprising: (a) combining at least two filler material components to form a biocompatible mixture; (b) choosing a setting time for the mixture; and (c) regulating a temperature of the mixture to influence reaction kinetics so that the mixture does not set before the chosen setting time.

Self-consolidating geopolymer compositions utilizing fly ash and inorganic mineral including alkaline earth metal oxide as cementitious reactive components and include cement set retarder. The alkaline earth metal oxide is preferably calcium oxide (also known as lime or quicklime) and / or magnesium oxide. The inorganic minerals including alkaline earth metal oxide have an alkaline earth metal oxide content preferably greater than 50 wt. %, more preferably greater than 60 wt. %, even more preferably greater than 70 wt. %, and most preferably greater than 80 wt. %, for example greater than 90 wt. %. The cementitious reactive powder may optionally also include one or more aluminous cements and one or more source of calcium sulfates. The cementitious reactive powders are activated with an alkali metal chemical activator selected from alkali metal salt and / or alkali metal base. Methods for making the compositions are also disclosed.

In the method of making a gypsum slurry, a polycarboxylate-based dispersant, a modifier, and a hydraulic material including stucco are selected for use in the slurry. These components are then combined with water to form a slurry, wherein the modifier is added to the slurry before the slurry phase is formed from the water, the stucco, and the dispersant. It has been shown that the modifier will have less efficacy when added after the dispersant and the stucco have been contacted in the aqueous slurry. In a preferred embodiment, a quantity of stucco is obtained and the modifier and the dispersant are selected. A pre-dissolved solution of dispersant and modifier is prepared in water to form a solution prior to addition to the stucco. After mixing the solutions, the stucco is added to form the slurry. Optionally, the slurry is then shaped into a product and allowed to set.

The invention provides a road engineering base course and soil road base polymer grouting material. The material is characterized by comprising the following components in parts by weight: 100 parts of metallurgical slag, 30 parts of high-lime fly ash, 10 parts of metakaolin, 1-3 parts of thickening water-retaining agent, 30 parts of alkaline exciting agent and 2-4 parts of additive. The material has the advantages of quick setting, early strength, large fluidity and good permeability.