scholarly journals The Effect of Curing Time on the Engineering Properties of Sawdust and Lime Stabilized Expansive Soils

2020 ◽  
Author(s):  
John Bosco Niyomukiza ◽  
Sri Prabandiyani Retno Wardani ◽  
Bagus Hario Setiadji
Keyword(s):  
Expansive Soils ◽  
Engineering Properties ◽  
Curing Time

scholarly journals Investigations on Engineering Properties of Solidified/Stabilized Pb-Contaminated Soil Based on Alkaline Residue

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Fusheng Zha ◽  
Dongdong Pan ◽  
Long Xu ◽  
Bo Kang ◽  
Chengbin Yang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Contaminated Soil ◽  
Microstructural Analysis ◽  
Engineering Properties ◽  
Contaminated Sites ◽  
Adsorptive Capacity ◽  
Curing Time ◽  
Test Results ◽  
Hydration Products ◽  
Microstructure Characteristics

Solidification/stabilization (S/S) has been considered as one of the most effective techniques for remediation of the heavy metal-contaminated sites. Among various binders adopted in S/S, alkaline residue (AR) could be considered as a new binder to treat heavy metal-contaminated soil due to its strong adsorptive capacity for heavy metal ions. So in this paper, the strength, leaching, and microstructure characteristics of the solidified/stabilized Pb-contaminated soil by using alkaline residue are systematically investigated. Test results present that the unconfined compressive strength (UCS) of the treated soil will increase, while the leached Pb2+ concentration will decrease, with the increase of the alkaline residue content in the specimen. The UCS increases significantly with the curing time increasing during the initial 28 days, after which the UCS of the specimen becomes stable. The leached Pb2+ concentration decreases significantly at the initial 28 days followed by a stable trend with curing time increasing. The UCS decreases and the leached Pb2+ concentration increases with the increase of the initial Pb2+ concentration in the specimen. The microstructural analysis performed by scanning electron microscope (SEM) showed that the increase of the alkaline residue content and curing time will result in more hydration products and densified microstructure, which could effectively improve the engineering properties of the specimen.

Improvement in Engineering Properties of Expansive Soils using Ground Granulated Blast Furnace Slag

2018 ◽  
Vol 92 (3) ◽  
pp. 357-362 ◽  
Author(s):  
Hassan Mujtaba ◽  
Tahir Aziz ◽  
Khalid Farooq ◽  
Nagaratnam Sivakugan ◽  
Braja M. Das
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Expansive Soils ◽  
Engineering Properties ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

Correlation of Unconfined Compressive Strength and California Bearing Ratio in Laterite Soil Stabilization Using Varied Zeolite Content Activated by Waterglass

2020 ◽  
Vol 998 ◽  
pp. 323-328
Author(s):  
Achmad Bakri Muhiddin ◽  
Marthen M. Tangkeallo
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Soil Stabilization ◽  
Dry Weight ◽  
Engineering Properties ◽  
High Plasticity ◽  
Curing Time ◽  
Laterite Soil ◽  
Zeolite Content ◽  
Meta Silicate

In remote areas, most roads still use pavements that are very sensitive to climate change, especially those using clay pavements with high plasticity. In addition to the issue of cost, the difficulty of obtaining a proper source of material is another problem that has led to soaring prices for materials. In this regard, a study was conducted using local materials, namely zeolite as a stabilizing material added with waterglass as activating agent. The research began with samples of laterite soil and natural zeolite for XRD test (microstructure testing), and then testing for laterite soil’s index properties and engineering properties, namely Unconfined Compressive Strength and CBR value. The purpose of the test is to determine the correlation between the Unconfined Compressive Strength (UCS) and the soil bearing capacity (CBR) caused by adding zeolite as stabilizer material and waterglass as activator with increasing curing time. Laterite soils contain a brownish red iron oxide. The stabilizing material zeolite contains a crystalline mineral of alumina silicate SiO2. While waterglass composed of sodium meta silicate. Stabilization carried out by mixing 4%, 8%, 12%, 16%, and 20% of zeolite with addition of 2% waterglass, percentage was measured based on soil dry weight. Specimens were tested at curing time of 0, 7, 14, and 28 days. The test result shows increasing UCS and CBR values with increasing percentage of zeolite. At mix of 20% zeolite and 2% waterglass, the unconfined compressive strength reaches 23.54 kg/cm2 with CBR value 58% at 28 days of curing time.

scholarly journals A Review on Expansive Soils Stabilized with Different Pozzolanic Materials

2022 ◽  
Vol 28 (1) ◽  
pp. 1-18
Author(s):  
Ahmed Al-Kalili ◽  
Ahmed S. Ali ◽  
Abbas J. Al-Taie
Keyword(s):  
Expansive Soils ◽  
Expansive Soil ◽  
High Volume ◽  
Engineering Properties ◽  
Collapsible Soil ◽  
Calcined Clay ◽  
Wide Range ◽  
Pozzolanic Materials ◽  
Materials Used ◽  
Furnace Slag

Soils that cause effective damages to engineer structures (such as pavement and foundation) are called problematic or difficult soils (include collapsible soil, expansive soil, etc.). These damages occur due to poor or unfavorited engineering properties, such as low shear strength, high compressibility, high volume changes, etc. In the case of expansive soil, the problem of the shrink-swell phenomenon, when the soil reacts with water, is more pronounced. To overcome such problems, soils can be treated or stabilized with many stabilization ways (mechanical, chemical, etc.). Such ways can amend the unfavorited soil properties. In this review, the pozzolanic materials have been selected to be presented and discussed as chemical stabilizers. The selected pozzolanic materials are traditional, industrial, or byproducts, ashes of agricultural wastes, and calcined-clay types. They are lime, cement, blast furnace slag, fly ash, silica fume, rice husk ash, sugarcane straw ash, egg ash, coconut husk ash, and metakaolin. In general, the stabilization of expansive soils with pozzolanic materials has an essential impact on swelling and Atterberg-limits and positively affects compaction and strength parameters. However, there is a wide range for the percentages of pozzolanic materials used as stabilizers. The content (15% to 20%) is the most ratios of the stabilizers used as an optimal percentage, and beyond this ratio, the addition of the pozzolanic materials produces an undesirable effect.

scholarly journals Effect of Compaction Energy on Engineering Properties of Expansive Soil

2017 ◽  
Vol 3 (8) ◽  
pp. 610 ◽  
Author(s):  
Sadam Hussain
Keyword(s):  
Expansive Soils ◽  
Energy Levels ◽  
Expansive Soil ◽  
Substantial Improvement ◽  
Engineering Properties ◽  
Engineering Structures ◽  
Expansive Clays ◽  
Swell Potential ◽  
Compaction Energy ◽  
Strength And Deformation

Swelling of expansive clays is one of the great hazards, a foundation engineer encounters. Each year expansive soils cause severe damage to residences, buildings, highways, pipelines, and other civil engineering structures. Strength and deformation parameters of soils are normally related to soil type and moisture. However, surprisingly limited focus has been directed to the compaction energy applied to the soil. Study presented herein is proposed to examine the effect of varying compaction energy of the engineering properties i.e. compaction characteristics, unconfined compressive strength, California bearing ratio and swell percentage of soil. When compaction energy increased from 237 KJ/m3 to 1197 KJ/m3, MDD increased from 1.61 g/cm3 to 1.75 g/cm3, OMC reduced from 31.55 percent to 21.63 percent, UCS increased from 110.8 to 230.6 KPa, and CBR increased from mere 1 percent to 10.2 percent. Results indicate substantial improvement in these properties. So, compacting soil at higher compaction energy levels can provide an effective approach for stabilization of expansive soils up to a particular limit. But if the soil is compacted more than this limit, an increase in swell potential of soil is noticed due to the reduction in permeability of soil.

Permeability of Expansive Soils Modified/Stabilized with lime (Review Paper)

2021 ◽  
Vol 14 (2) ◽  
pp. 129-140
Author(s):  
Muwafaq Awad ◽  
Ibrahim Al-Kiki ◽  
Amina Khalil
Keyword(s):  
Expansive Soils ◽  
Expansive Soil ◽  
Pozzolanic Reaction ◽  
Curing Temperature ◽  
Curing Time ◽  
Short Term ◽  
Coefficient Of Permeability ◽  
Review Study ◽  
Time Periods

The aim of this paper was to review the mechanism of the expansive soil-lime reactions: short term and long-term reactions in both lime modification and lime stabilization. The focus of the study was the effect of curing time for a certain centigrade 25C curing temperature in both lime modification / stabilization-expansive soils on the coefficient of permeability. Peer reviewed articles published between 2000- and 2019 were collected and relevant data were extracted. Results of this review study showed that the coefficient of permeability of expansive soils modified with lime increased during the first 7 days of curing time at curing temperature 25C and it remains constant or slightly decreased for longer curing time periods. However, for expansive soils stabilized with lime, it was found that the coefficient of permeability increased during the first 7-day curing time at curing temperature 25C, then decreased during the longer curing time periods (pozzolanic reaction). It is also noted that even though the coefficient of permeability decreased during pozzolanic reaction, it remains higher than that of the untreated soils

The distribution, formation and engineering properties of Quaternary regional Sediments in China

1991 ◽  
Vol 7 (1) ◽  
pp. 491-501
Author(s):  
G. Guorui
Keyword(s):  
Yellow River ◽  
Southern China ◽  
Expansive Soils ◽  
Northern China ◽  
Climatic Conditions ◽  
Engineering Properties ◽  
Geographical Environment ◽  
Development Processes ◽  
Relationship Of ◽  
The Relationship

AbstractIn China, there exist various regional sediments of the Quaternary such as loess soils of the Yellow River in northern China, lateritic soils in southern China and expansive soils in the broad plains of the Yangtze River. In the past, these Quaternary Sediments were often treated as special soils and their engineering properties tended to be studied accordingly. However, not much attention was given to relationships that may exist between these regional soils and, so far, the distribution and formation of regional Sediments have not been systematically studied. Only when it was found that regional classifications of soils (their names and their engineering properties) were in disagreement with each other for adjacent areas was the subject of relationship considered.Recently, the author has tested and studied a number of samples of various Quaternary regional Sediments. The relationship of their composition and microstructural features to their engineering properties has first been analysed on the basis of their basic properties. The distribution of regional sediments has then been studied in detail according to geographical environment and climatic conditions. Finally, formation and development processes for the various regional Sediments of the Quaternary in China have been postulated.

Sign in / Sign up

Export Citation Format

Share Document