摘要:
The invention relates to a redispersible polymer powder including a polymer to be redispersed and an ortho-cresol based condensation polymer or salt thereof and methods for manufacturing same. More particularly, the invention relates to the use of an ortho-cresol based condensation polymer as a redispersing aid in a redispersible polymer powder.
摘要:
Casing strings are cemented in deep water offshore formations using a cement composition having a short transition time comprised of hydraulic cement, a water reducing additive, a dispersing additive, a compressive strength enhancing and set retarding additive, a set accelerating additive and water.
摘要:
Vorgeschlagen wird ein Verfahren zur Verzögerung des Abbindens von Gips, welches sich dadurch auszeichnet, daß man Kondensationsprodukte von enzymatisch gewonnenen Proteinhydrolysaten mit Formaldehyd einsetzt.
摘要:
A deep mix soil stabilization system comprises a hydraulic cement grout, and a soil dispersant comprising at least one of i) an acrylic acid polymer or copolymer, or a salt thereof, ii) an acrylic acid/sulfonic acid copolymer, or a salt thereof, iii) an acrylic acid/phosphonic acid copolymer or a salt thereof, and iv) a blend of an acrylic acid polymer with at least one of a sulfonic acid polymer and a phosphonic acid polymer, or a salt thereof. A deep mix soil stabilization method comprises drilling into soil while injecting a soil dispersant and subjecting the soil and the soil dispersant to mixing to form a soil and soil dispersant mixture, said soil dispersant comprising at least one of i) an acrylic acid polymer or copolymer, or a salt thereof, ii) an acrylic acid/sulfonic acid copolymer, or a salt thereof, iii) an acrylic acid/phosphonic acid copolymer or a salt thereof, iv) a blend of an acrylic acid polymer with at least one of a sulfonic acid polymer and a phosphonic acid polymer, or a salt thereof; and, mixing a cementitious binder with said soil and soil dispersant mixture to form a predominantly soil-containing stabilized soil.
摘要:
La présente invention concerne des produits de condensation et leur utilisation comme agents fluidifiants pour liants hydrauliques tels que les ciments, les plâtres et la chaux. Elle concerne plus particulièrement des produits susceptibles d'être obtenus par condensation en milieu aqueux, d'au moins :
un composé (a) disposant d'au moins deux fonctions amines, un aldéhyde (b), un acide (c), comportant au moins un groupement SH, ou un sel d'un tel acide, un acide (d) comportant au moins une fonction amine ou un sel d'un tel acide, et éventuellement un ou plusieurs composés (e) susceptibles de libérer un ou plusieurs ions sulfonates.
摘要:
Cement and aggregates are mixed with each other by the use of a dispersant to the effect of water reduction and prevention of slump loss, the dispersant comprising (1) (I), (Ila) and an amine reaction terminator of (Ilb), (Ilc), (IVg) and/or (IVh) ; (2) (I), (Ilb) and/or (Ilc) and (Ille) and/or (Illf) ; or (3) (I), (Ila) and (Ille) and/or (Illf), in which formulae, R is hydrogen or an alkyl having 1 to 6 carbon atoms ; X is an alkali metal ; X1 is hydrogen, an alkyl having 1 to 6 carbon atoms, carboxylic group, an alkali metal salt carboxylate, sulfonic group, an alkali metal salt sulfonate, hydroxy or methoxy ; Y1 is carboxyic or an alkali metal salt carboxylate, sulfonic or an alkali metal salt sulfonate ; Y is hydrogen or an alkali metal ; Z is hydrogen, an alkyl having 1 to 6 carbon atoms or -CH2S03M ; and M is hydrogen or an alkali metal.