title: Utilization of ground waste seashells in cement mortars for masonry and plastering.
abstract: In this research, four types of waste seashells, including short-necked clam, green mussel, oyster, and cockle, were investigated experimentally to develop a cement product for masonry and plastering. The parameters studied included water demand, setting time, compressive strength, drying shrinkage and thermal conductivity of the mortars. These properties were compared with those of a control mortar that was made of a conventional Portland cement. The main parameter of this study was the proportion of ground seashells used as cement replacement (5%, 10%, 15%, or 20% by weight). Incorporation of ground seashells resulted in reduced water demand and extended setting times of the mortars, which are advantages for rendering and plastering in hot climates. All mortars containing ground seashells yielded adequate strength, less shrinkage with drying and lower thermal conductivity compared to the conventional cement. The results indicate that ground seashells can be applied as a cement replacement in mortar mixes and may improve the workability of rendering and plastering mortar.
authors: Faculty of Architecture and Planning, Thammasat University, Khlong Luang, Pathumthani 12121, Thailand. lertwatt@tu.ac.th
authors: Pusit
authors: P
authors: Lertwattanaruk
authors: Natt
authors: N
authors: Makul
authors: Chalothorn
authors: C
authors: Siripattarapravat
mesh_terms: D060105:Animal Shells / Q000737:chemistry* / Q000648:ultrastructure; D000818:Animals; D049872:Bivalvia / Q000737:chemistry* / Q000648:ultrastructure; D055598:Chemical Phenomena; D019245:Compressive Strength; D003252:Construction Materials / Q000032:analysis*; D008855:Microscopy, Electron, Scanning; D012037:Refuse Disposal / Q000379:methods*; D013045:Species Specificity; D013052:Spectrometry, X-Ray Emission; D013785:Thailand; D013814:Thermal Conductivity; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water