Physical and Mechanical Properties of Lime and Wood Ash Plastering Mortars

Abstract

AbstractCement industry is one of the causes of increasing carbon dioxide in the world. Using sustainable cementitious materials as a full or partial replacement of cement is become vital to reduce the massive amount of carbon dioxide emission and encourage the use of waste materials. This study aims to build a database for the characteristics of different types of plastering mortars using waste materials, mainly, lime and wood ash as a partial replacement for cement. Four different cement types (CEM I 32.5R, CEM I 42.5R, CEM II B-S 32.5N, and CEM II B-LL 42.5N) were used with two types of lime and wood ash with different proportions were studied. To investigate the different properties of mortar, flow table test, compressive strength, flexural strength, and drying shrinkage strain were carried out. Results showed that the mortars with CEM II B-LL 42.5N have the highest values in flexure and compressive strength. However, CEM II B-S 32.5N showed the least value of dry shrinkage strain. Wood ash decreased the flexure and compressive strength of all mortars except for CEM I 32.5R which had the same value when using lime and cement. Moreover, fly ash increased the drying shrinkage for all mortars while the dry shrinkage value of mortar with CEM I 42.5R decreased.KeywordsCementPlastering mortarLime