Abstract:
The invention relates to a preparation of a concrete having a compression resistance of at least 400 MPa and a fracturation energy of at least 1 000 J/m . A mix containing substantially cement, fine sand, amorphous silica, crushed quartz, steel wool, a fluidifying agent and water in specific proportions is mixed and, after setting, the concrete is fired at a temperature of at least 250 DEG C. The figure is a micrography showing the microstructure of concrete according to the invention. The invention provides particularly for the making of concrete parts in replacement of steel, for example anchoring heads for prestressed cables.
Abstract translation:本发明涉及具有至少400MPa的压缩阻力和至少1000J / m 2的断裂能的混凝土的制备。 将含有基本上水泥,细砂,无定形二氧化硅,粉碎石英,钢丝绒,流化剂和特定比例的水的混合物混合,并且在凝固之后,混合物在至少250℃的温度下被烧制。 显示根据本发明的混凝土的微结构的显微照片。 本发明特别用于制造用于替换钢的混凝土部件,例如用于预应力电缆的锚定头。
Abstract:
A ceramic support capable of supporting a catalyst comprising a ceramic body having fine pores with a diameter or width up to 1000 times the ion diameter of a catalyst component to be supported on the surface of the ceramic body, the number of the fine pores being not less than 1×1011 pores per liter, is produced by introducing oxygen vacancies or lattice defects in the cordierite crystal lattice or by applying a thermal shock to form fine cracks.
Abstract:
The invention relates to an agglomerate containing at least one of the following water-soluble or water-dispersible materials as a bonding base polymer: carboxylized and/or alkoxylized starch, cellulose ether and fully synthetic vinyl polymers and/or polyacrylates. The agglomerate is characterized in that it contains a blasting agent which produces a high swelling pressure, but, advantageously, does not gel. The agglomerate can have a regular geometric form or not. Its weight should be between 0.5 and 500 g. The agglomerate is used in particular in the production of lump-free paste.
Abstract:
A premixed ultra-light sandless mortar for use with clay and concrete tiles. The mortar uses vermiculite or perlite aggregate in place of heavy aggregates such as sand. The mortar cement is made from portland cement, lime, air entraining agents, and water repelling agents. The resulting compound retains large amounts of moisture which increases hydration time resulting in improved bonding strength, and increased tile uplift strength. The light weight of the mortar also allows a full bed of mortar to be laid on the roof with the resulting benefit of an addition insulating layer for the building. The mortar is suitable for roofing or floor tile applications.
Abstract:
A silencer comprising one or more sound-absorbing parts of ceramic material. The ceramic material is porous and the sound-absorbing parts are self-supporting and have a specific resistance to air flow of 10.sup.3 -10.sup.7 Pas/m.sup.2 and a compression strength of at least 40 kN/m.sup.2, preferably at least 400 kN/m.sup.2.
Abstract translation:一种消音器,包括一个或多个陶瓷材料的吸声部分。 陶瓷材料是多孔的,吸声部分是自支撑的,并且具有103-107Pas / m 2的空气流动的特有阻力,并且压缩强度至少为40kN / m 2,优选至少为400kN / m 2。