TY  - BOOK
AU  - Rian,Lian San
AU  - Pichai Nimityongskul, 
AU  - Karasudhi,Pisidhi
AU  - Ping Kunawatsatit, 
ED  - Government of Republic o f China, 
TI  - Development and use of superplasticizers in concrete
T2  - Thesis
PY  - 1984///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Concrete
KW  - Additives
N1  - A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology; Thesis (M.Eng.) - Asian Institute of Technology, 1984
N2  - Two commercially available superplasticizers and two  types of additives derived from sugar cane bagasse and rice  straw which are collected from different local paper factories  in Thailand were used in different concrete mixes to examine the feasibility f o r use as water-reduced and f lowing  concretes. Tests were made with different mix proportions and  the effects of types a nd dosages of admixtures on the  mechanical properties of concrete namely compressive strength, modulus or rupture a nd modulus o f elasticity were  investigated. The test results indicated that the commercially  available superplasticizers remarkably improved the mechanical  properties of water-reduced concrete and greatly increased the workability of flowing concrete without adversely affecting the strengths. For water-reduce d concrete, the additive derived from sugar can e bagasse is considered to be suitable for use but its efficiency is low compared to the commercial  superplasticizers. The other additive derive d from rice straw  is found to be of inferior quality than the one derives from  sugar cane bagasse. An adverse effect on later strengths t or  rich mixes was observe educing this type of additive. For  flowing concrete, the additive derived from sugar cane bagasse is economically feasible to be used with a dosage limit of 2%
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B20550
ER  -