03207nam a2200409 4500 20260818090601.0 040898 th eng .b10197242 AIT Thesis no. ST-84-21 Rian, Lian San Development and use of superplasticizers in concrete Bangkok : Asian Institute of Technology, 1984 65 p. Thesis ; no. ST-84-21 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 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%. Concrete Additives Pichai Nimityongskul, Chairperson Karasudhi, Pisidhi, Examination Committee Ping Kunawatsatit, Examination Committee Government of Republic o f China, Scholarship Donor Asian Institute of Technology. Thesis ; no. ST-84-21 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B20550 .b10197242 mnait s 240429 2 951012 m a s 0 mnait mnait mnarc 20 40 Barcode : 30050003352837 CREATED : 1995-10-13 RECORD # : i10236600 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003061297 CREATED : 1995-10-13 RECORD # : i10236612 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160012869 CREATED : 2016-05-04 RECORD # : i12925007 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 28549 28549 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. ST-84-21 30050003352837 2026-08-18 09:06:01 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. ST-84-21 30050003061297 2026-08-18 09:06:01 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. ST-84-21 30050160012869 2026-08-18 09:06:01 1 2026-08-18 40