The present invention relates to floor levelling compositions which can be mixed with water and comprise fluorescein or a derivative thereof. The present invention further relates to the use of fluorescein or fluorescein derivatives as indicator for the readiness for being covered of a floor levelling composition mixed with water.

The present invention relates to floor levelling compositions which can be mixed with water and comprise fluorescein or a derivative thereof. The present invention further relates to the use of fluorescein or fluorescein derivatives as indicator for the readiness for being covered of a floor levelling composition mixed with water.

A composition of matter includes: a first composition and a second composition configured to react with each other and provide an epoxy-based binder system; and aggregate for being disbursed into the binder system to provide a material; wherein a moisture content of the aggregate is controlled according to a desired strength for cured material. A method of application of the resulting epoxy based material is disclosed.

A composition of matter includes: a first composition and a second composition configured to react with each other and provide an epoxy-based binder system; and aggregate for being disbursed into the binder system to provide a material; wherein a moisture content of the aggregate is controlled according to a desired strength for cured material. A method of application of the resulting epoxy based material is disclosed.

A composition includes: an ethoxylated fatty alcohol having from 8 to 22 carbon atoms and having an ethoxylation level of from 1 to 10 moles of ethylene oxide per mole of fatty alcohol, an alkanolamine or a morpholine, or its derivatives or mix of them, and a fatty acid. A hydraulic binder includes the composition. A process prevents the formation of a surface film at the surface of hydraulic binders, wherein the composition is added to the dry hydraulic binder. A process for preparing the composition, includes: melting the ethoxylated fatty alcohol and heating it at a temperature above its melting point, adding water to the melted ethoxylated fatty alcohol and mixing, adding fatty acid to the mixture and mixing, adding alkanolamine or morpholine, or its derivative or mix of them to the mixture obtained and mixing, and adding water.

A process for making a cement, the cement containing a naturally occurring silicate bound in an organic binder, and a metal oxide. An example process includes dissolving the organic binder at least in part, using an effective amount of a chemical activator. An example process also includes providing the silicate to react with other components of the cement. An example process also includes providing the silicate to participate in crystal growth. An example process also includes providing the silicate so that the cement is a structural load bearing cement.

A process for making a cement, the cement containing a naturally occurring silicate bound in an organic binder, and a metal oxide. An example process includes dissolving the organic binder at least in part, using an effective amount of a chemical activator. An example process also includes providing the silicate to react with other components of the cement. An example process also includes providing the silicate to participate in crystal growth. An example process also includes providing the silicate so that the cement is a structural load bearing cement.

An example cement includes a naturally occurring silicate bound in an organic binder, a metal oxide, and a chemical activator. The chemical activator is in an effective amount, for dissolving the binder, at least in part, so that the silicate reacts with other components of the cement, the silicate participates in crystal growth; and the cement is a structural load bearing cement.

An example cement includes a naturally occurring silicate bound in an organic binder, a metal oxide, and a chemical activator. The chemical activator is in an effective amount, for dissolving the binder, at least in part, so that the silicate reacts with other components of the cement, the silicate participates in crystal growth; and the cement is a structural load bearing cement.

The present application provides a composition containing a maleic anhydride copolymer, a polyaziridine crosslinker, optionally an additional crosslinking agent such as an amine crosslinker, and optionally a gel time control agent. Methods of using the composition to treat a subterranean formation are also provided.