Lime mortar lime putty when mixed at a 1 to 3 ratio, fill these voids to create a compact mortar. Analysis of mortar samples from historic buildings typically indicates a higher ratio of around 1 part lime to 2 part aggregate/sand was commonly used. A traditional coarse plaster mix also had horse hair added for reinforcing and control of shrinkage, important when plastering to wooden laths and for base (or dubbing) coats onto uneven surfaces such as stone walls where the mortar is often applied in thicker coats to compensate for the irregular surface levels. If shrinkage and cracking of the lime
Mortar (masonry) of either gypsum or lime. Gypsum mortar was essentially a mixture of plaster and sand and was quite soft. In the Indian subcontinent, multiple cement types have been observed in the sites of the Indus Valley Civilization, such as the Mohenjo-daro city-settlement that dates to earlier than 2600 BCE. Gypsum cement that was ""light grey and contained sand, clay, traces of calcium carbonate, and a high percentage of lime"" was used in the construction of wells, drains and on the exteriors of ""important looking buildings"." Bitumen mortar was also used at a lower-frequency, including in the Great Bath at Mohenjo-daro.