马来西亚黏性土的石灰改性与稳定

IF 0.3 Q4 ENGINEERING, GEOLOGICAL Geotechnical Engineering Pub Date : 2005-08-01 DOI:10.1201/9780203739501-83
K. Kassim, R. Hamir, K. Kok
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引用次数: 32

摘要

石灰掺加粘性土对其理化性质有显著影响。石灰掺入土壤后,通过阳离子交换和絮凝作用改变其塑性特性和粒径,使土壤发生改性。另一方面,稳定是指根据土壤的有效石灰含量、矿物学、微观结构特性和碱性环境,在改性后的后期阶段发生的过程。碱性环境是使硅酸盐和铝酸盐成为土壤-石灰反应发生的可溶性物质所必需的。通过扫描电镜(SEM)和x射线衍射(XRD)检测到随着年龄增长而结晶的新型胶凝化合物。被称为水合硅酸钙和水合铝酸钙的结晶凝胶与土壤颗粒结合,从而增加了土壤的抗剪强度。从微观结构和矿物学角度研究了强度的发展规律。通过土、石灰基本特性试验、抗压强度试验、化学试验和微观结构鉴定等试验,对土、石灰反应的内部机理和石灰的改性稳定过程有了清晰的认识。
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Modification and stabilization of Malaysian cohesive soils with lime
Lime mix with cohesive soil has a pronounce effect on its physical and chemical properties. The soil modifies as soon as lime is mixed by changing its plasticity characteristics and particle size through cation exchange and flocculation. Stabilization on the other hand is a process which took place in a later stage after modification depending on the available lime content, mineralogy, microstructure properties and alkaline environment of the soil. The alkaline environment is essential in making the silicates and aluminates become soluble for the soil-lime reaction to take place. New cementitious compounds that crystallized with age were detected through SEM and XRD. The crystallized gels known as calcium silicate hydrate and calcium aluminate hydrate bind the soil particles thus increasing the shear strength of the soil. The strength development based on the microstructure and mineralogy aspects were studied. Tests conducted which include basic characteristics tests on soil and lime, compressive strength test, chemical tests and microstructure identification have provided the inside mechanism of soil-lime reactions and a clear understanding of lime modification and stabilization processes.
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来源期刊
Geotechnical Engineering
Geotechnical Engineering ENGINEERING, GEOLOGICAL-
CiteScore
0.50
自引率
0.00%
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0
期刊介绍: The objectives of the Association shall be the promotion of co-operation among geotechnical societies in SE Asia; and the assistance to member societies who have limited number of members. Now there is only one combined web titled: AGSSEA-SEAGS. SEAGS & AGSSEA encourage the submission of scholarly and practice-oriented articles to its journal. The journal is published quarterly. Both sponsors of the journal, the Southeast Asian Geotechnical Society and the Association of Geotechnical Societies in Southeast Asia, promote the ideals and goals of the International Society of Soil Mechanics and Geotechhnical Engineering in fostering communications, developing insights and enabling the advancement of the geotechnical engineering discipline.
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