Single component potassium silicate cement for dry gunning
AssigneePennwalt Corporation
InventorsGeorge R. Leah, Robert R. Pierce
Life of this patent
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Abstract
A pulverulent single component potassium silicate cement composition is disclosed and claimed which is capable of being installed by the dry gunite method utilizing water addition at the nozzle to produce a dense continuous quick setting acid resistant cement on horizontal, sloping, vertical and overhead surfaces. The cement composition comprises a special hydrated potassium silicate water glass powder, an acid releasing hardener, and a filler such as silica sand. The composition of the potassium silicate and the proportions of the ingredients must be closely regulated to obtain satisfactory cements. The potassium silicate cement opens a new era of silicate monolithic linings which provide maximum resistance to acid environments other than hydrofluoric acid.
Claims11
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting acid-resistant cement comprising the following pulverulent ingredients expressed as precent by weight:
- (a) Potassium silicate having an SiO.sub.2 /K.sub.2 O weight ratio within the range of about 1.8 to 2.5 of SiO.sub.2 to 1 of K.sub.2 O, and a water content within the range of 10 to 25%--8 to 24%
- (b) At least one acid releasing hardener--1.3 to 10%
- (c) At least one acid resistant inorganic filler 66 to 90%
- (d) At least one surfactant--0.05 to 2%
- (e) At least one coating oil--0.1 to 2%,
- the said acid releasing hardener having a lower limiting weight ratio with respect to the potassium silicate of 1 to 6 and an upper limiting weight ratio with respect to the said potassium silicate of 1 to 2.5.
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting cement comprising the following pulverulent ingredients expressed as percent by weight:
- (a) Potassium silicate having an SiO.sub.2 /K.sub.2 O weight ratio within the range of about 1.8 to 2.5 of SiO.sub.2 to 1 of K.sub.2 O, and a water content within the range of 10 to 25%--8 to 24%
- (b) At least one acid releasing hardener--1.3 to 10%
- (c) At lease one inorganic filler--66 to 90%
- (d) At least one surfactant--0.05 to 2%,
- the said acid releasing hardener having a lower limiting weight ratio with respect to the potassium silicate of 1 to 6 and an upper limiting weight ratio with respect to the said potassium silicate of 1 to 2.5.
A single component potassium silicate cement composition capable of being dry gunited by mixing with water in the nozzle of a concrete gunning machine to produce a quick setting acid-resistant cement comprising the following pulverulent ingredients expressed as percent by weight:
- (a) Potassium silicate having an SiO.sub.2 /K.sub.2 O weight ratio of 2 and a water content of about 16% by weight--16.0%
- (b) Condensed aluminum phosphate hardener--4.0%
- (c) Silica sands--76.4%
- (d) Clay--3.2%
- (e) Surfactant--0.1%
- (f) Mineral Oil--0.3%.
Dependencies are inferred from the claim text.