摘要:
Provided herein are fiber reinforced cementitious materials and mixtures with increased crack resistance. The cementitious materials and mixtures include a cement and at least one carbon fiber. Also provide is a fiber reinforced cementitious mortar that includes the fiber reinforced cementitious material to which at least one of water, an aggregate material or a chemical admixture is added.
摘要:
Additives for concrete manufacture and related methods of making and using such additives are described. The additives include basalt fibres, pozzolanic compounds, and sugars derived from soluble polysaccharides. Patching kits including an additive, cement, and sand are also described.
摘要:
A cementitious composition comprising (a) a hydraulic fraction, the hydraulic fraction comprising (i) a cementitious base material, the cementitious base material containing a source of aluminium and a source of calcium; and (ii) a calcium sulphoaluminate cement, and (b) a retarder selected from the group consisting of a sugar, an organic acid and a combination thereof.
摘要:
Magnesium based cements are provided using one or more slurry precursors. In an embodiment, a method of forming a magnesium-based cement includes providing an aqueous slurry of a magnesium compound. A magnesium cement co-reactant is also provided. The aqueous slurry of the magnesium compound is mixed with the magnesium cement co-reactant to provide the magnesium-based cement.
摘要:
The present invention relates to modification of hydratable cement and cementitious materials, such as mortar cement and masonry or ready-mix concrete using ketone alcohol oil waste ("KAOW") material, obtained as an alkali-soluble liquor waste byproduct at a certain stage in the commercial production of cyclohexanol and cyclohexanone. Preferred applications for KAOW are in chemical admixture formulations whereby KAOW is used to substitute for a portion of a cement dispersant such as sodium lignosulfonate, sodium gluconate, or other conventional dispersant. Another preferred use is in mortar cement and masonry concrete units such as blocks, pavers, curbstones, and other concrete masonry units wherein air void systems advantageously foster freeze-thaw durability.
摘要:
Gypsum panels, panel cores, and methods for the manufacture thereof are provided herein. A gypsum panel core includes gypsum and fiberglass, the fiberglass being present in the core in an amount of from about 1 lb/msf to about 6 lb/msf. The core has a thickness of about inch, a weight of from about 1400 lb/msf to about 1750 lb/msf, and an ASTM E-119 wood stud fire test rating of at least 30 minutes.
摘要:
A composition for sealing hydrocarbon wells, wherein the composition comprises a prepolymer; a free radical initiator; a hydraulic material; a monomer and water, wherein the composition further comprises a radical inhibitor. A method and a use of the composition is also described.
摘要:
Geopolymerschaum-Formulierung für ein nicht brennbares, schallabsorbierendes, wärmedämmendes Geopolymerschaumelement Vorgeschlagen wird eine Geopolymerschaum-Formulierung, umfassend mindestens ein anorganisches Bindemittel, ausgewählt aus der Gruppe, bestehend aus latent hydraulischen Bindemitteln, puzzolanischen Bindemitteln sowie Mischungen davon; mindestens einen alkalischen Aktivator, ausgewählt aus der Gruppe, bestehend aus Alkalimetallhydroxiden, Alkalimetallcarbonaten, Alkalimetallaluminaten, Alkalimetallsilikaten sowie Mischungen davon; mindestens ein Tensid, ausgewählt aus der Gruppe, bestehend aus anionischen Tensiden, kationischen Tensiden, nicht-ionischen Tensiden sowie Mischungen davon; eine Gasphase und Wasser. Diese Formulierung kann zusätzlich einen Zement sowie Additive zur Schaumstabilisierung, Schrumpfminderung, Flexibilisierung, Hydrophobierung, Dispergierung, Fasern und Füllstoffe sowie Mischungen davon umfassen und kann in einkomponentiger oder zweikomponentiger Form vorliegen. Weiterhin vorgeschlagen wird ein Verfahren zur Herstellung dieser Formulierung durch Schäumung mittels mechanischem Eintrag von Luft, die Verwendung der Formulierung zur Herstellung eines nicht brennbaren, schallabsorbierenden, wärmedämmenden Geopolymerschaumelements sowie das besagte Geopolymerschaumelement.
摘要:
The present invention relates to a method for the production calcium sulfoaluminate (belite, ferrite, ternesite) clinker using fluxes/mineralizers comprising the following steps - providing a raw meal comprising at least sources of CaO, AI 2 O 3 , SO 3 - sintering the raw meal in a kiln at 1100 to 1350 °C to provide a clinker, - cooling the clinker, wherein at least one compound containing copper and a glass powder or a glass powder are added prior to sintering. The invention further relates to the clinker obtained, as well as to calcium sulfoaluminate based cements and binders produced from the clinker.