A method of treating a lost circulation zone in a wellbore includes contacting an accelerant composition comprising triethanolamine with a cement composition in the lost circulation zone, the cement composition comprising at least: from 1 weight percent (wt. %) to 90 wt. % cement precursor based on the total weight of the cement composition; and from 5 wt. % to 70 wt. % water based on the total weight of the cement composition; where a weight ratio of triethanolamine to the cement precursor is from 0.1 percent (%) to 60%; and curing the cement composition in the lost circulation zone to form a cured cement, where the triethanolamine accelerates the curing rate of the cement composition and the cured cement seals the lost circulation zone.

A method of treating a lost circulation zone in a wellbore includes contacting an accelerant composition comprising triethanolamine with a cement composition in the lost circulation zone, the cement composition comprising at least: from 1 weight percent (wt. %) to 90 wt. % cement precursor based on the total weight of the cement composition; and from 5 wt. % to 70 wt. % water based on the total weight of the cement composition; where a weight ratio of triethanolamine to the cement precursor is from 0.1 percent (%) to 60%; and curing the cement composition in the lost circulation zone to form a cured cement, where the triethanolamine accelerates the curing rate of the cement composition and the cured cement seals the lost circulation zone.

An accelerator powder for cement and also rapid-setting binder compositions which contain the accelerator powder and the use in mortar or concrete. The accelerator powder includes from 10 to 99.7% by weight of a water-insoluble mineral powder P and from 0.3 to 90% by weight of at least one compound V selected from the group consisting of alkali metal halides and alkaline earth metal halides, alkali metal nitrates and alkaline earth metal nitrates, alkali metal nitrites and alkaline earth metal nitrites, alkali metal thiocyanates and alkaline earth metal thiocyanates and hydroxyalkylamines or salts thereof, and mixtures thereof.

An admixture for mineral binder compositions, in particular an after-treatment agent for mineral binder compositions, including at least one water-absorbing substance and at least one shrinkage reducer.

An admixture for mineral binder compositions, in particular an after-treatment agent for mineral binder compositions, including at least one water-absorbing substance and at least one shrinkage reducer.

A method of reducing corrosion in tubular strings installed in wellbores includes dispensing an accelerated cement composition into a wellbore annulus, a casing-casing annulus, or both, the accelerated cement composition comprising a cement composition and an accelerant composition, where: the cement composition comprises a cement precursor and water; the accelerant composition comprises triethanolamine; and a concentration of the triethanolamine in the accelerated cement composition is greater than or equal to 10,000 parts per million by weight; allowing the accelerated cement composition to cure in the annulus to form a cured cement, where the triethanolamine reacts with a metal of the tubular string, the reaction forming a protective layer on the surfaces of the tubular string that inhibits dissolution of iron from the metal of the tubular string.

A method of reducing corrosion in tubular strings installed in wellbores includes dispensing an accelerated cement composition into a wellbore annulus, a casing-casing annulus, or both, the accelerated cement composition comprising a cement composition and an accelerant composition, where: the cement composition comprises a cement precursor and water; the accelerant composition comprises triethanolamine; and a concentration of the triethanolamine in the accelerated cement composition is greater than or equal to 10,000 parts per million by weight; allowing the accelerated cement composition to cure in the annulus to form a cured cement, where the triethanolamine reacts with a metal of the tubular string, the reaction forming a protective layer on the surfaces of the tubular string that inhibits dissolution of iron from the metal of the tubular string.

Disclosed is a liquid regulator for ultra-dispersed, high-mud-resistance, high-foam-stability, low-shrinkage and enhanced autoclaved aerated concrete, which comprises the following ingredients in parts by weight: 75 parts to 85 parts of hyperdispersant; 5 parts to 10 parts of anti-mud agent; 1 part to 3 parts of shrinkage reducing ingredient; 10 parts to 20 parts of reinforcing ingredient; and 0.05 part to 0.1 part of foam stabilizing ingredient; and the invention further discloses a preparation and application thereof. By adding the liquid regulator into the autoclaved aerated concrete, the effects of ultra-dispersion, high mud resistance, high foam stability, low shrinkage and performance enhancement can be achieved.

A multi-component reaction resin system for use with thread-forming screws contains a curable compound. In particular, the multi-component reaction resin system contains at least one radically curable compound and an inorganic filler in a first component, and contains a hardener for at least one radically curable reactive resin and water in a further second component. The inorganic filler has hydrophilic properties, and the reaction resin system is characterized by a low content of radically curable compounds that carry hydroxyl groups. The multi-component reaction resin system can be used with thread-forming screws.

A multi-component reaction resin system for use with thread-forming screws contains a curable compound. In particular, the multi-component reaction resin system contains at least one radically curable compound and an inorganic filler in a first component, and contains a hardener for at least one radically curable reactive resin and water in a further second component. The inorganic filler has hydrophilic properties, and the reaction resin system is characterized by a low content of radically curable compounds that carry hydroxyl groups. The multi-component reaction resin system can be used with thread-forming screws.