This paper is studying the value of compressive strength, flexural strength test, tensile strength test, according to the standard 25MPa (ratio cement1:sand1:stone2), 30MPa (ratio cement1: sand1.5:stone1.5), 35MPa (ratio cement1: sand0.75:stone1), and 40MPa (ratio cement1: sand0.25:stone0.75), and by using materials in the central part of the country, especially the province, where the materials used: cement, manufactured from the SAVANNAKHET cement factory , sand and river rocks and the building, (1). For testing the value of compressive strength concrete), size15cmx30 there are 12 samples here: (Concrete Grade 25MPa contains 3 examples, 30MPa concrete with 3 samples, 35MPa concrete with 3 samples, 40MPa concrete with 3 samples 28 days old. (2). For testing the value of tensile strength concrete), size15cmx15cmx15cm there are 12 samples here: (Concrete Grade 25MPa contains 3 examples, 30MPa concrete with 3 samples, 35MPa concrete with 3 samples, 40MPa concrete with 3 samples 28 days old. (3). For testing the value of flexural strength concrete), Size 15cmx15cmx60cm contains 12 samples here: (Concrete Grade 25MPa contains 3 samples, 30MPa concrete with 3 samples, 35MPa concrete with 3 samples, 40MPa concrete with 3 samples 28 days old, for testing the value of tensile strength concrete) given to a Standard AASHTO(American Association of State Highways and Transportation Officials Test), ASTM (American Society for Testing and Materials)… with the age of 28 days respectively, it is then tested with a mechanical machine to find the unit value to analyze the value of compressive strength, flexural strength test, tensile strength test.
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- Authors: Deuanhaksa, Surya , An, Le Vinh , Cay, Bui Xuan