FEASIBILITY STUDY TO USE CRUSHING STONE FILLER INSTEAD OF SAND IN LOW STRENGTH CONCRETE

Construction Material

Abstract

Concrete is one of main materials for construction industries especially in construction of road, bridge, housing, irrigation, tunnel, terminal, airport, port, retaining wall and other civil works. The main components of concrete includes cement, sand, stone (gravel) and water while in the northern region of Laos is really lack of sand and costly to transport of milestone through mountainous road in the north. Sand resources in Oudomxay province is mostly imported from Pakbeng district (150km to central of the province) to support the construction industry in the province and waste more cost. However, Oudomxay province is plenty of stone resources and there are many crushing stone plants in the vicinity the town and many amount of crushed stone filler wasting around the crushing plants This research was focused concrete mixed design without fine aggregate or sand by using those crushing stones in 3 plants named 1) Angnumhin pit located 6km away from city, B. Konkane Pit, 18km away from city along with National Road No. 2W and Mueang Lha Pit, 11km from city along with National Road No. 2E to possibly mix the low strength concrete for specific purposes of construction. From the results shown that the general properties of filler is accountable to be mixed in low strength concrete (<25MPa) while cleaning was required where the high dust remaining. Filler from B. Konkane Pit is the best from 3 sampled sources in this study to use filler instead of sand to mix the low strength concrete.