摘要:
A composite product comprising a metakaolin-based mineral polymer. The composite product has a number of applications including use as a fire resistant material, use as a thermally insulating material and use as an impact resistance material. Methods of preparing a composite product according to the present invention and a kit of parts for preparing the composite product are also disclosed.
摘要:
L'invention vise à fournir à un moindre coût de nouveaux mélanges primaires utiles pour la préparation de bitumes-polymères. Pour ce faire, le mélange primaire selon l'invention comprend : (a) au moins 25 % en poids, de préférence de 25 à 80 % en poids, de polymère, (b) au moins une résine tackifiante thermoplastique de masse moléculaire moyenne comprise entre 100 et 3 000 g/mol, (c) et/ou un ou plusieurs (mono) esters alkyliques -de préférence méthyliques- d'acides gras en C16-C18, en particulier d'huile de tournesol, d'huile de lin, d'huile de colza, d'huile de soja, et/ou d'huile de tournesol isomérisée ou non; l'ester (c) étant nécessairement présent lorsque la résine tackifiante (b) a un indice d'acide mesuré selon la norme NF EN ISO 660 inférieur à 50 mg KOH/g. L'invention a également pour objet les bitumes-polymères, les émulsions, les enduits/enrobés obtenus à partir de ce mélange primaire et leurs procédés de préparation.
摘要翻译:本发明的目的是以较低的成本提供可用于制备聚合物沥青的新型初级混合物。 为此,根据本发明的主要混合物包含:(a)至少25重量%,优选25-80重量%的聚合物,(b)至少一种平均分子量为100的热塑性增粘树脂 至(c)和/或一种或多种单烷基 - 优选C16-C18的脂肪酸甲基酯,特别是向日葵油,亚麻籽油,菜籽油,大豆油和/或葵花籽油 任选地异构化; 当增粘树脂(b)具有按照标准NF EN ISO 660测量的酸值小于50mg KOH / g时,酯(c)必须存在。 本发明还涉及从该主要混合物获得的聚合物沥青,乳液和涂料/涂覆产品,以及其制备方法。
摘要:
A boron carbide composite body produced by an infiltration process that possesses high mechanical strength, high hardness and high stiffness has applications in such diverse industries as precision equipment and ballistic armor. In one embodiment, the composite material features a boron carbide filler or reinforcement phase, and a silicon carbide matrix produced by the reactive infiltration of an infiltrant having a silicon component with a porous mass having a reactable carbonaceous component. In an alternate embodiment, the infiltration can be caused to occur in the absence of the reactable carbonaceous component, e.g., to produce "siliconized boron carbide". Potential deleterious reaction of the boron carbide with silicon during infiltration is suppressed by alloying or dissolving a source of boron, or a source of carbon, or preferably both boron and carbon into the silicon prior to contact of the silicon infiltrant with the boron carbide. In a preferred embodiment of the invention related specifically to armor, good ballistic performance can be advanced by loading the porous mass or preform to be infiltrated to a high degree with one or more hard fillers such as boron carbide, and by limiting the size of the morphological features, particularly the ceramic phases, making up the composite body. The instant reaction-bonded boron carbide (RBBC) composite bodies are at least comparable in ballistic performance to current boron carbide armor ceramics but feature lower cost and higher volume manufacturing methods, e.g., infiltration techniques.
摘要:
A composite concrete with a low cement and fibre content having good mechanical properties as well as good impact, shock and projectile resistance properties. The concrete includes a) 70-85 wt.% of particles (A) having a particle size distribution of around 0.01/3 mm to 0.01/50 mm; b) 2-10 wt.% of particles (B) having a size of 0.01-1 mu m, i.e. from 10 to 10 mm; c) 3-20 wt.% of hydraulic binder; d) 0.1-3 wt.% of a dispersing or plasticising agent; (e) 0.05-8.5 wt.% of fibres; and (f) mixing water, said percentages being weight percentages based on the sum of the weights of components a) to d).
摘要:
A process for making a fiber reinforced cementitious product such as a panel which hardens to an ultra-high compressive strength composite for use in making panels with ballistic and blast resistant properties. The panel has a continuous phase resulting from curing an aqueous mixture, in the absence of silica flour, of inorganic cement binder, inorganic mineral filler having a particle size of about 150-450 microns, pozzolanic mineral filler, and polycarboxylate based superplasticizer self-leveling agent, and water. The mixture may also include alkanolamine and acid or acid salt. The continuous phase may be reinforced with fiber distributed in the continuous phase before curing to form a panel. The panel may be reinforced with a fiber reinforced skin attached to at least one surface of the core, e.g., by lamination with an adhesive, e.g., epoxy, to form a ballistic and blast resistant cementitious armor panel.
摘要:
The various embodiments of the present invention relate generally to high strength foam materials and methods of making the same. More particularly, various embodiments of the present invention relate to high strength foam materials comprising pozzolans, such as cenospheres derived from fly ash. An embodiment of the present invention comprises, a pozzolan foam material comprising a pozzolan, an alkali, a silicate, and an organosilicon compound. Various embodiments of the present invention are directed to strong, lightweight materials that are environmentally-friendly and can be economically manufactured.
摘要:
A method for producing cement-based composite structures comprising providing a mixture comprising fine particles of a cement binder having a size in the range of from about 0.5 to 100 mu m, ultrafine particles having a size in the range of from about 5 nm to about 0.5 mu m, e.g. silica fume, and water, and casting the mixture followed by subjecting the cast mixture to a high temperature curing sequence comprising (a) heating the cast mixture to a temperature of not more than about 300 DEG C over a time period sufficiently long to avoid steam explosions and heat-induced crack formation in the structure, (b) maintaining the cast mixture at an elevated temperature of not more than about 300 DEG C for a period of at least about 2 hours, and (c) allowing the cast mixture to cool to ambient temperature over a time period sufficiently long to avoid heat-induced crack formation to result in the composite structure.
摘要:
Compositions of the invention are made from a mixture of cement binder, ground rubber particles, water, latex, and mineral aggregate. The cement binder may be Portland cement or any other suitable cement. These compositions have high flexural strength and dynamic impact resistance and can be used to make concrete (10), mortar (20), and cement board (30).
摘要:
The present invention provides a bidirectional energy-transfer system comprising: a thermally and/or electrically conductive concrete, disposed in a structural object; a location of energy supply or demand that is physically isolated from, but in thermodynamic and/or electromagnetic communication with, the thermally and/or electrically conductive concrete; and a means of transferring energy between the structural object and the location of energy supply or demand. The system can be a single node in a neural network. The thermally and/or electrically conductive concrete includes a conductive, shock-absorbing material, such as graphite. Preferred compositions are disclosed for the thermally and/or electrically conductive concrete. The bidirectional energy-transfer system may be present in a solar-energy collection system, a grade beam, an indoor radiant flooring system, a structural wall or ceiling, a bridge, a roadway, a driveway, a parking lot, a commercial aviation runway, a military runway, a grain silo, or pavers, for example.