การพัฒนากำลังและความคงทนต่อซัลเฟตของคอนกรีตใส่มวลรวม
เศษขวดแก้วใสผสมเถ้าชานอ้อย
ประเภทบทความ :
บทความวิชาการ
หมวดหมู่ :
วิศวกรรมโยธา
This research investigated compressive strength development and magnesium sulfate durability of
concrete using waste clear glass clue (WCGC) as coarse aggregate blending sugarcane bagasse ash (SBA) with high
value of loss on ignition. SBA was replaced partially of Portland cement, Type I in proportion of 15, 20 and
25wt.%. Water to binder ratio of 0.4 was constant throughout the study and cubic specimens were prepared in size
of 100×100×100 mm3 under atmosphere of 26°C with 80% relative humidity. The specimens were uncured and
cured in water for 7 and 28 days. Physico-mechanical properties of concrete were determined on water absorption,
bulk density, Shore hardness, electrical resistivity, compressive strength and volumetric drying shrinkage.
Magnesium sulfate durability of uncured specimens was performed in saturated magnesium sulfate solution for 8
weeks. X-ray diffraction and microstructure with Scanning Electron Microscope were analysed on the selected high
strength specimen. The 28-day compressive strength of 15%SBA displayed the highest value of 43 MPa and can be
suppressed magnesium sulfate attack in deleterious concrete. It was also revealed that coarse aggregate contained
WCGC presented a negligible effect on the physical-mechanical properties of concrete
วันที่ลง01/07/2019
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