ผลกระทบจากการใช้เถ้าถ่านหินบดละเอียดต่อกำลังอัดและความทนทานของคอนกรีตที่ใช้มวลรวมจากการย่อยเศษคอนกรีต

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Rattanachu, P.;Premruethai, K.;Tangchirapat, W.;Jaturapitakkul, C.

ปีที่เผยแพร่ (ค.ศ.): 2015

Volume number: 7

Issue number: 1

หน้าแรก: 92

หน้าสุดท้าย: 105

นอก: 1906-5981

บทคัดย่อ

This research aimed to utilize a fly ash leftover from the power plant at the Electricity Generating Authority of Thailand, Mae Moh district, Lampang Province, as a pozzolanic material in recycled aggregated concrete in order to improve its quality and durability. Watering binder ratio of all concretes was kept constantly at 0.48 and the slump of concrete was controlled between 5 and 10 cm. Ground fly ash was used partially to replace cement at 20%, 35% and 50% by weight of binder. The concrete samples were casted and divided into 3 groups (1) concrete was made from natural aggregates, (2) concrete was made from river sand and coarse recycled aggregates and (3) concrete was made from both fine and coarse recycled aggregates. Compressive strength, water permeable co-efficiency, chloride ions penetration and hydrating for shrinkage of recycled aggregate for concrete were examined. The results revealed that the use of ground fly ash could be partially replaced cement that can improve compressive quality of recycled aggregate for concrete. Within 28 days, the recycled coarse aggregate for concrete with ground fly ash would be enhanced the compressive strength of concrete to remain as that of the control concrete. The use of ground fly ash had reduced water permeability of recycled aggregate for concrete , and it was approximately 2 times lower than that of recycled aggregation of concrete without ground fly ash and approximately 1.5 times lower than that of conventional concrete. In addition, the use of ground fly ash had improved the penetration of chloride ions resistance of recycled aggregate for concrete.The researchdemonstratedthat the appropriate replacement ofgroundfly ashinorder to obtainthe most appropriate compressive strength, low water permeability, and high chloride ions resistance of recycled aggregate for concrete was 35% by the weight of binder. Moreover, the hydrating for shrinkage of recycled aggregate for concrete had been decreased with the increasing of the replacement of ground fly ash.

คำสำคัญ

Fly Ash, Recycled Aggregate, Compressive Strength, Water Permeability, Chloride Ion Penetration