초록 ▼

A blended hydraulic cement composition, curable at low temperatures, including temperatures below the freezing point of water, is composed of portland cement, slag, pozzolans including metakaolin, and admixtures including potassium carbonate and water reducing compositions. The cement is particularl

A blended hydraulic cement composition, curable at low temperatures, including temperatures below the freezing point of water, is composed of portland cement, slag, pozzolans including metakaolin, and admixtures including potassium carbonate and water reducing compositions. The cement is particularly useful in producing concrete compositions which achieve high strength in a brief period of time, and continue curing at ambient temperatures, and temperatures below the freezing point of water.

대표청구항 ▼

A blended hydraulic cement composition, capable of curing at temperatures below freezing, consisting essentially of: From 50 parts to about 80 parts portland cement From 13 parts to about 35 parts fly ash From 0 parts to about 10 parts metakaolin From 0 parts to about 6 parts slag From 0 parts to 4

A blended hydraulic cement composition, capable of curing at temperatures below freezing, consisting essentially of: From 50 parts to about 80 parts portland cement From 13 parts to about 35 parts fly ash From 0 parts to about 10 parts metakaolin From 0 parts to about 6 parts slag From 0 parts to 4 parts admixture, wherein said admixture is a set regulating additive, From 1 part to about 5 parts potassium carbonate, wherein the parts of potassium carbonate plus one-half of the parts of metakaolin is equal to at least 2. A blended hydraulic cement composition, capable of curing at temperatures below freezing, consisting essentially of: From 50 parts to about 80 parts portland cement From 13 parts to about 35 parts fly ash From 0 parts to about 10 parts metakaolin From 0 parts to about 6 parts slag From 0 parts to 4 parts admixture, wherein said admixture is a set regulating additive, From 1 part to about 5 parts sodium carbonate, wherein the parts of sodium carbonate plus one-half of the parts of metakaolin is equal to at least 2.