Investigation of the Optimum Shotcrete Mixing Ratio for Slope Protection using Fly Ash

Thang Kel Win, Nur Irfah Mohd Pauzi
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Abstract

Shotcrete has now grown in popularity and can replace cast-in-place (CIP) concrete in applications such as retaining walls and slope stabilisation. However, due to the problems like cracking due to shrinkage and the durability concern, this practise is still limited. So, cementitious material such as fly ash is used in this situation to increase the strength of the concrete and also to make sure it is high durability and safe to use in construction. Fly ash can be known as a coal combustion residual which is commonly occur in thermal power plant and it had been widely used as an alternative material during the production of Portland cement concrete. Supplementary cementitious materials is widely used in the mixing of concrete due to its unique properties which can harden the concrete via its hydraulic and pozzolanic activity. A series of experiments will be conducted to make sure that the fly ash that had been mixed with Portland cement is safe to use and also can increase the compressive strength of the cement. Throughout the experiments, a series of data will be display with the addition of 5%,10%,15%,20%,25%,30%,35% of pozzolans in the cement mixing ratio. The addition of fly ash during the mixing of concrete will indirectly reduce the cost of construction and also the rate of pollution to the environment as it is being classified as a scheduled waste in Malaysia according to the Environmental Quality Act 1974.This research will mainly focus on the performance of shotcrete with the addition of cementitious material which is fly ash as an alternative product compare to the tradition concrete and compare the differences in the achievement of shotcrete with and without the addition of fly ash so that the comparison is more clearly and more understandable. Next, the utilization of the nominal aggregates will be 10-20mm.The amount of fly ash added to the mixing of concrete will be in the range of 5% to 35%.
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粉煤灰护坡喷射混凝土最佳配合比研究
喷射混凝土现在越来越受欢迎,可以在挡土墙和边坡稳定等应用中取代现浇(CIP)混凝土。然而,由于收缩引起的开裂和耐久性问题,这种做法仍然受到限制。因此,在这种情况下,使用诸如粉煤灰之类的胶凝材料来增加混凝土的强度,并确保它在建筑中具有高耐久性和安全性。粉煤灰是火电厂中常见的煤燃烧残渣,在硅酸盐水泥混凝土生产中作为替代材料得到了广泛的应用。补充胶凝材料由于其独特的性能而被广泛应用于混凝土的搅拌中,它可以通过其水力和火山灰活性使混凝土硬化。将进行一系列试验,以确保与波特兰水泥混合的粉煤灰可以安全使用,并且可以提高水泥的抗压强度。在整个实验过程中,在水泥掺量中掺入5%、10%、15%、20%、25%、30%、35%的火山灰会显示出一系列的数据。根据马来西亚1974年环境质量法,在混凝土搅拌过程中加入粉煤灰将间接降低施工成本,也会降低对环境的污染程度。本研究将主要研究添加粉煤灰作为替代产品的胶凝材料后喷射混凝土的性能与传统混凝土的性能对比,并比较添加和不添加粉煤灰后喷射混凝土性能的差异,使对比更加清晰易懂。接下来,标称骨料的利用率将为10-20mm。掺入混凝土的粉煤灰掺量在5% ~ 35%之间。
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来源期刊
自引率
0.00%
发文量
342
审稿时长
6 weeks
期刊介绍: MATEC Web of Conferences is an Open Access publication series dedicated to archiving conference proceedings dealing with all fundamental and applied research aspects related to Materials science, Engineering and Chemistry. All engineering disciplines are covered by the aims and scope of the journal: civil, naval, mechanical, chemical, and electrical engineering as well as nanotechnology and metrology. The journal concerns also all materials in regard to their physical-chemical characterization, implementation, resistance in their environment… Other subdisciples of chemistry, such as analytical chemistry, petrochemistry, organic chemistry…, and even pharmacology, are also welcome. MATEC Web of Conferences offers a wide range of services from the organization of the submission of conference proceedings to the worldwide dissemination of the conference papers. It provides an efficient archiving solution, ensuring maximum exposure and wide indexing of scientific conference proceedings. Proceedings are published under the scientific responsibility of the conference editors.
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