The softer and more workable stones are of various degrees of absorbency, and are often more retentive of moisture than common brick. Professor Ansted states that the facility with which sandstone absorbs water is illustrated by the quantity it contains... A Practical Treatise on Concrete and how to Make it: With Observations on ... - Seite 105 von Henry Reid - 1869 - 108 Seiten Vollansicht -
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