Effect on Water Retention of Different Mortar Mix with Different Percentage of Fine Crumb Rubber

Abstract

Mortar is mixture of sand, binder and water content. The water content is very effective parameter of mortar which may change many properties of mortar especially strength and workability. The workability of mortar mix is important property while designing mortar mix. The compressive strength of mortar mix gets affected by workability of mortar and workability of mortar is depended on amount of water. The waste rubber is major issue now a days and waste rubber are obtained from tyres. These rubbers contribute the filing a large portion of landfills. As these waste materials are not easily decomposed, thus has created scopes for reusing and recycling waste rubber in various applications. Numerous researchers used this waste material in their research work on mortar and they partially replaced coarse and fine aggregate with tyre waste materials. They concluded that waste tyre rubber or crumb rubber may useful in mortar. In this research work, the fine aggregates are partially replaced by fine crumb rubber with 2.5% variation and compressive strength test and flow table test are performed in laboratory. In addition, the retention of water in mortar is also determined by water retention test apparatus fabricated in house. The water retention test apparatus works on principle of suction of water from mortar under gravity motion. The compressive strength test and water retention tests are performed for 1:3, 1:4, 1:5 and 1:6 mortar mix controlled specimen and mix specimen of partial replacement of fine aggregate by fine crumb rubber.

Keywords: Compressive Strength, Fine Crumb Rubber, Flow Table Test, Water Retention Test, Fine Aggregate