Efek Penambahan Bahan Aditif Non-Alami terhadap Perilaku Lempung Plastisitas Tinggi yang Distabilisasi dengan Semen

Eksergi Pub Date : 2023-07-03 DOI:10.31315/e.v20i2.9517

Soewignjo Agus Nugroho, Bambang Wisaksono, Heru Suharyadi

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Abstract

Cement is proven increasing the strength of soft clays. Monmorillonite has a high shrinkage. Another hand, Kaolin has a small shrinkage. Waste material usage for stabilization agent was widely carried out this decade. BAFA (bottom ash fly ash) and POFA (palm oil fuel ash) are rich in Silica and Alumina, so they used to substitute of cement. The study examined the effect of Monmorillonite, Kaolin, BAFA and POFA on stabilization of clay with cement. Bentonite from 4% to 16% (is equated to BAFA and POFA, in ratio of 2:1) and Kaolin by 2.5%, used to reduce clay shrinkage, mixed with cement by 3% and 5%. Soil behavior will be reviewed from laboratory tests on curing-noncuring and soaked-unsoaked conditions. The results show changes in Atterberg Limits and Hydraulic Conductivity (permeability, k). Cement as well as BAFA and POFA reduce Plastic Limit greater than Liquid Limit. So, Plasticity Index decreased. It’s can be seen that cement and ash waste decreasing the permeability value. More Ash and less cement, make more impermeable soil. Addition of 3% and 5% cement increased the UCS values from 14.32 kPa to 81.20 kPa and 589.68 kPa and CBR value from 0.78% to 4.20% and 589.68 42.12% respectively

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用水泥稳定的高塑粘土行为增加非天然添加剂的影响

水泥已被证明可以提高软粘土的强度。蒙脱石的收缩率很高。另一方面，高岭土有一个小的收缩。近十年来，固化剂的废料使用得到了广泛的应用。BAFA（底灰-粉煤灰）和POFA（棕榈油-燃料灰）富含二氧化硅和氧化铝，因此它们被用来代替水泥。研究了蒙脱石、高岭土、BAFA和POFA对水泥稳定粘土的影响。膨润土4%至16%（相当于BAFA和POFA，比例为2:1）和高岭土2.5%，用于减少粘土收缩，与水泥混合3%和5%。土壤特性将通过实验室试验对未固化和未浸泡条件下的养护进行审查。结果显示了阿太堡界限和水力传导率（渗透率，k）的变化。水泥以及BAFA和POFA降低塑性极限大于液限。因此，塑性指数下降。可以看出，水泥和灰渣降低了渗透性值。更多的灰烬和更少的水泥，使土壤更不透水。添加3%和5%的水泥使UCS值分别从14.32kPa和589.68kPa增加到81.20kPa和589.98kPa，CBR值分别从0.78%增加到4.20%和589.68 42.12%

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Eksergi

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4 weeks