03698nam a2200433 4500 20260818143145.0 220798 th eng .b10359059 AIT Thesis no.ST-92-08 Lim, Char Ching Influence of aggregate content on strengths and workabilities of high-strengh concrete Bangkok : Asian Institute of Technology, 1992 74, [35] leaves Thesis ; no. ST-92-08 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, 1992 This experimental investigation deals with the influence of aggregate content on the compressive and flexural strengths of a high strength concrete having a 28-day compressive strength of 85 MPa on cylindrical specimen. In addition, the effect on workability and modulus of elasticity of concrete in compression was also determined. The primary objective was to establish the optimum aggregate-cement ratio(A/C) and the sand-aggregate ratio(S/A) of a high strength concrete mix proportion. These ratios were determined based on the compressive strength achievement within a minimum slump value of 150mm. Limestone and basalt aggregates were used for strengths and workabilities comparison. Test results indicated that the optimum A/C ratio for limestone and basalt concretes was 3.25 and 3.0 respectively. Better strengths and workabilities were achieved when using limestone aggregate. It appeared that concrete slump was independent of the aggregate type when the A/C ratio fell below 2.5. The flexural and compressive strengths were found to increase with increasing A/C ratio. So was the modulus of elasticity of concrete in compression. However, the flexural strength increased at a relatively slower rate than its compressive strength. It was found that for a given W/C and S/A ratio, the compressive strength decreased as the cement content was increased but with improved workability. Too low a water-cementitious material ratio might also result in a reduction in strength. Using the optimum A/C ratio of 3.25 for limestone concrete, the cotTesponding optimum S/A ratio was found to be 0.4, in which case the slump, compressive and flexural strengths were found to be maximum. Strength of materials Concrete Testing Aggregates (Building materials) Pichai Nimityongskul, Chairperson Pisidhi Karasudhi, Examination committee Maekawa, Koichi, Examination committee German Academic Exchange Service(DAAD) Asian Institute of Technology. Thesis ; no. ST-92-08 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B16893 .b10359059 mnait s 240402 2 951012 m a s 0 mnait mnait mnarc 20 40 Barcode : 30050003351466 CREATED : 1995-10-14 RECORD # : i10447416 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003351474 CREATED : 1995-10-14 RECORD # : i10447428 LPATRON : 1017884 LCHKIN : 2006-08-25 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 7 TOT RENEW : 1 Barcode : 30050160022363 CREATED : 2016-04-04 RECORD # : i12922651 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 60132 60132 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no.ST-92-08 30050003351466 2026-08-18 14:31:45 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no.ST-92-08 30050003351474 2026-08-18 14:31:45 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.ST-92-08 30050160022363 2026-08-18 14:31:45 1 2026-08-18 40