摘要:
In order to reduce the amount of an organism attractant substance remaining inside concrete that tends be used wastefully and also to allow the organism attractant substance to effectively flow out gradually in a long period of time, an environmentally active, preserving and repairing-use concrete block is provided in which the air content and flowability of the concrete are increased, and the congregating and growing effects for fishes and shellfishes and the adhering and growing effects for algae are maintained so that a high attractant effect by odor of the organism attractant substance is obtained. An environmentally active preserving and repairing-use concrete block is provided with at least three or more legs, and in this structure the environmentally active preserving and repairing-use concrete block is formed by using an environmentally active preserving and repairing-use concrete having high air content and high flowability formed by kneading an organism attractant substance having a specific odor therein.
摘要:
The instant invention is concerned with the post-treatment of β-hemihydrate plasters for the purpose of stabilization. The invention relies in the addition of a retardant to the calcined β-hemihydrate. It is also the purpose of the invention to provide stabilized β-hemihydrate plasters which exhibit advantageous properties.
摘要:
In order to reduce the amount of an organism attractant substance remaining inside concrete that tends be used wastefully and also to allow the organism attractant substance to effectively flow out gradually in a long period of time, an environmentally active, preserving and repairing-use concrete block is provided in which the air content and flowability of the concrete are increased, and the congregating and growing effects for fishes and shellfishes and the adhering and growing effects for algae are maintained so that a high attractant effect by odor of the organism attractant substance is obtained. An environmentally active preserving and repairing-use concrete block is provided with at least three or more legs, and in this structure the environmentally active preserving and repairing-use concrete block is formed by using an environmentally active preserving and repairing-use concrete having high air content and high flowability formed by kneading an organism attractant substance having a specific odor therein.
摘要:
A method of manufacturing a cementitious composite including: (1) mixing an extrudable cementitious composition by first forming a fibrous mixture comprising fibers, water and a rheology modifying agent and then adding hydraulic cement; (2) extruding the extrudable cementitious composition into a green extrudate, wherein the green extrudate is characterized by being form-stable and retaining substantially a predefined cross-sectional shape; (3) removing a portion of the water by evaporation to reduce density and increase porosity; and (4) heating the green extrudate at a temperature from greater than 65°C to less than 99°C is disclosed. Such a process yields a cementitious composite that is suitable for use as a wood substitute. Particularly, by using higher curing temperatures for preparing the cementitious building products, the building products have a lower bulk density and a higher flexural strength as compared to conventional products. The wood-like building products can be sawed, nailed and screwed like ordinary wood.
摘要:
The present invention relates to a composition for producing a light-weight refractory brick, containing at least one aluminum silicate and/or a calcium-aluminum silicate, and an inorganic binder, the composition being characterized in that the composition has a content of calcium silicates of 5 to 25% by weight relative to the dry composition. The invention further relates to a light-weight refractory brick, to the use thereof, and to a method for the production thereof.
摘要:
The invention relates to dry construction material mixtures based on calcium sulfate as a binder, comprising a redispersable polymer powder, water-retaining agents based on polysaccharide structures, setting retarders, and a super-absorbent copolymer.
摘要:
The invention relates to the use of copolymers on a polyamide basis, containing at least one graft lateral chain consisting of ethylenic unsaturated compounds, in construction chemistry, as well as with the prospecting, exploiting and completion of oil- and gas deposits and with deep bore holes. Preference is given to the use with compounds containing hydraulic binding agents, particularly as a water-retaining agent. The cementing of oil- and gas drillings is of particular importance. Typical representatives of the polyamide component are natural polyamides, like caseins, galantines, collagens and soy proteins. The copolymers used in the invention, having typically a molar mass of Mn > 20 000 g/mol, representatives being water-soluble and biodegradable are particularly preferred.
摘要:
L'invention concerne une composition de mousse de chaux comprenant par rapport au poids total de matières sèches de ladite composition: - au moins 65%, de préférence entre 70 et 90%, en poids de chaux hydraulique naturelle ou d'un mélange de chaux hydraulique naturelle et de ciment, - 0,5% à 10% en poids de fibres, de préférence de fibres végétales, - 1 % à 2,5% en poids d'agent moussant, et - une quantité d'eau variant de 100% à 200% en poids d'eau, et éventuellement - jusqu'à 30%, de préférence entre 5 et 25%, en poids de charges minérales, et éventuellement - un accélérateur de prise, et éventuellement, - un réducteur d'eau, et éventuellement - un gélifiant, ainsi que son procédé de fabrication et celui de remplissage d'éléments de constructions, tels que notamment des briques de terre cuite.