Potential Use of Enzymes in the Preparation of Compressed Stabilized Earth Blocks

Muguda, Sravan; Nagaraj, H. B.

doi:10.1061/(asce)mt.1943-5533.0001947

Cited by 15 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in the present study, it can be observed that clay portion is 21% which is higher than the recommended limit of 15%. Even at higher clay content, the soil has been used to prepare CSEBs and the reported evaluated engineering properties are quite better with TerraZyme treatment as indicated by the wet compressive strength being nearly 50% more than the blocks prepared without TerraZyme [37,38]. In addition, the blocks were observed to be quite durable as indicated by the loss in mass after being subjected to twelve cycles of alternate wetting and drying.…”

Section: Effect Of Terrazyme On Physical Properties Of the Soilmentioning

confidence: 99%

“…With this enhancement, one can explore in the development of lightly stabilised earthen construction materials using only enzymes or reduce the quantity of chemical stabilisers in heavily stabilised earthen construction materials by adding enzymes. The authors have recently brought out one such possibility of using enzymes along with conventional stabilisers in development of durable compressed stabilised earth blocks [37,38]. However, prior to its application as a stabiliser in earthen construction, it is important to understand more about the effect of enzymes and their effect on soil behaviour.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of enzymes on plasticity and strength characteristics of an earthen construction material

Muguda

Nagaraj²

2019

Geo-Engineering

Self Cite

View full text Add to dashboard Cite

In this study, a commercially available enzyme which is used popularly to improve sub-grade material for pavements was used as a potential stabilizer to improve soil properties used for earthen construction. As a preliminary study, the interaction of this enzyme with the soil was assessed by evaluating the plasticity and strength characteristics of enzyme treated soil with ageing. From the research findings, it was observed that with ageing, the liquid limit of soil decreased, while plastic and shrinkage limits increased, leading to reduced plasticity and shrinkage indices. The reduced plasticity and shrinkage indices indicate that soil has become relatively more volumetrically stable and less susceptible to crack formation. Further, strength characteristics under two different curing conditions were evaluated, and it was found that under sealed curing conditions, the treated soil had better compressive strength. The improvement of plasticity, shrinkage and strength characteristics due to the addition of enzymes can be advantageously used for development of lightly stabilized durable earthen construction material, and thus, eliminating the necessity of using conventional energy-intensive stabilizers. The findings from this study bring the immense potential of eco-friendly enzymatic stabilization in the development of modern sustainable earthen materials.

show abstract

Section: Effect Of Terrazyme On Physical Properties Of the Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of enzymes on plasticity and strength characteristics of an earthen construction material

Muguda

Nagaraj²

2019

Geo-Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…The aggregate-free surface may be promoted as bio-enzymes to improve locally available materials [14]. Compress earth block prepared from the blend of lime, cement, and enzyme gave a 50 % increment in wet compressive strength at 2 years of aging compared to the block prepared without enzyme [15].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Corex (Steel) Slag Reinforced with Terrazyme Treated Clay for Improvement of Soft Soil

Vasiya

Solanki²

2022

Trends Sci

View full text Add to dashboard Cite

Stability and settlement problems are common for foundations constructed on soft soils. In major parts of the world, ground improvement techniques have been used to mitigate these challenges. This research aims to stabilize the soft soils using corex steel slag blended with terrazyme treated clay. The corex steel slag is an industrial waste formed during the extraction of steel from ores through the corex process. The corex slag of sand size in the form of columns have been used to improve the load-carrying capacity of the soft soils and to control the settlement. To increase the stiffness of the corex slag columns, the terrazyme treated clay was mixed with the corex slag. The terrazyme is an eco-friendly and sustainable organic liquid and it is fully soluble in water. To prepare the terrazyme-processed clay gel 0 to 3 % of terrazyme dissolved in water was used. Maximum Dry Density (MDD) and Optimum Moisture Content (OMC) for terrazyme treated clay were determined through the compaction tests. Appropriate proportions of corex slag and terrazyme treated clay with a suitable curing period were obtained from unconfined compression tests. A series of laboratory model plate load tests for 3 foundation shapes were performed on soft soil, stabilized with a blend of corex slag and terrazyme treated clay. Improvement in the MDD with a reduction in OMC was noticed when terrazyme was added to soft soil. Unconfined Compressive Strength (UCS) value for corex slag increased with an increase in the content of terrazyme treated clay. Model plate load tests showed significant improvement in the load-carrying capacity of soft soil. HIGHLIGHTS Stability and settlements are the major problems for foundation constructed on soft soil Corex (Steel) slag blended with terrazyme treated clay is utilized to stabilize the soft soil The specimens prepared with corex steel slag and terrazyme treated clay demonstrate remarkable improvement in UCS value at 21 to 28 days of curing The soft soil stabilize with specimens in group reveled remarkable improvement in load-carrying capacity of soft soil GRAPHICAL ABSTRACT

show abstract

“…Sravan. and Nagaraj [10] mixed soil, cement lime, and enzymes to prepare compressed earth blocks. 50% improvement in wet compressive strength was found in the block comparing the block prepared without enzymes.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation on Black Cotton Soil using Terrazyme

2021

IJE

View full text Add to dashboard Cite

The application of biodegradable substances for the improvement of weak soil has given better results in the field of geotechnical engineering. These substances are fermented and extracted from vegetation. It reduced the void ratio, thickness of absorbed water and maximize the compaction. Terrazyme contains natural protein. It is non-toxic and eco-friendly. It is soluble in water. The black cotton soil is highly plastic with swelling potential. Reduction in moisture causes shrinking, leads to differential settlement of the foundation. This will results in damage to the structure. This paper presents experimental work on black cotton soil reinforced with Terrazyme. Various proportions of Terrazyme were mixed with black cotton soil to evaluate the engineering properties of soil. The change in index properties and strength parameters were assessed by experiments on treated and untreated soil. Atterberg limits, free swell index, compaction test, triaxial tests were performed. Experimental results show a reduction in liquid limit, plasticity index, free swell index, optimum moisture content, and compression index. Triaxial tests showed improvement in cohesion and angle of shearing resistance. The optimum dosage of Terrazyme was found 2% by weight of dry soil.

show abstract

Potential Use of Enzymes in the Preparation of Compressed Stabilized Earth Blocks

Cited by 15 publications

References 10 publications

Effect of enzymes on plasticity and strength characteristics of an earthen construction material

Effect of enzymes on plasticity and strength characteristics of an earthen construction material

An Experimental Study on Corex (Steel) Slag Reinforced with Terrazyme Treated Clay for Improvement of Soft Soil

An Experimental Investigation on Black Cotton Soil using Terrazyme

Contact Info

Product

Resources

About