Portland Cement Basics

Portland Cement is a mixture of Limestone (CaCO 3 ), mixed with a second material containing clay as source of alumino-silicate. Because clay is needed, usually an impure limestone which already contains some clay is used. The impure Limestone must be made of at least 80% Limestone. Depending on the purity of the limestone and … Continue reading Portland Cement Basics

Working with Fast-Drying Cement

When using fast-drying cement, mix cement powder with water until the mixture is very thin, thinner than regular concrete mixtures. it will begin to cure in a matter of seconds, and after a minute or two becomes unworkable It dries FAST.. so mix it in very small batches, even for a single small project, mix … Continue reading Working with Fast-Drying Cement