Experimental Investigations on Building Derived Materials in Chemically Aggressive Environment as a Partial Replacement for Sandy Soil in Ground Improvement

2018 ◽  
Author(s):  
Shreyans R. Surana ◽  
Arkamitra Kar ◽  
Anasua GuhaRay ◽  
Ashok Kumar Suluguru ◽  
M. Jayatheja
Keyword(s):  
Sandy Soil ◽  
Ground Improvement ◽  
Partial Replacement ◽  
Experimental Investigations ◽  
Aggressive Environment ◽  
Building Derived Materials

scholarly journals Concrete Incorporated With Silica Fume And Manufactured Sand Under Acidic Nature

2016 ◽  
Vol 12 (12) ◽  
pp. 4611-4613
Author(s):  
J Sahaya Ruben
Keyword(s):  
Sulphuric Acid ◽  
Silica Fume ◽  
Concrete Structures ◽  
Chloric Acid ◽  
Partial Replacement ◽  
Manufactured Sand ◽  
Aggressive Environment ◽  
Acid Environment ◽  
Acidic Nature ◽  
Selection Of

Now a dayAcid attack is growing threat to concrete structures. Using some alternate materials as partial replacement of cement and sand in the concrete is an important factor that enhances the performance of concrete in an aggressive environment. In this present study, the cement is replaced with silica fume by 10 % and the sand is replaced with manufactured sand up to 50%. The selection of these replacement materials involves a balance between economy and durability.The specimens are immersed in 2% concentration of both acids such as sulphuric acid and hydro chloric acid at 28 days. The grade of concrete is M30. From the results, it is observed that the concrete containing 10% silica fume and 40% manufactured sand has the better performance in acid environment.  

scholarly journals Influence of Partial Replacement of Micro-Silica by Fly-Ash on Strength Properties of Reactive Powder Concrete

2020 ◽  
Vol 9 (3) ◽  
pp. 2932-2937
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Fly Ash ◽  
Mechanical Performance ◽  
Cementitious Materials ◽  
Partial Replacement ◽  
Reactive Powder Concrete ◽  
Experimental Investigations ◽  
Reactive Powder ◽  
Micro Silica

Reactive powder concrete (RPC) is the ultra-high strength concrete made by cementitious materials like silica fumes, cement etc. The coarse aggregates are completely replaced by quartz sand. Steel fibers which are optional are added to enhance the ductility. Market survey has shown that micro-silica is not so easily available and relatively costly. Therefore an attempt is made to experimentally investigate the reduction of micro-silica content by replacing it with fly-ash and mechanical properties of modified RPC are investigated. Experimental investigations show that compressive strength decreases gradually with addition of the fly ash. With 10 per cent replacement of micro silica, the flexural and tensile strength showed 40 and 46 per cent increase in the respective strength, though the decrease in the compressive strength was observed to be about 20 per cent. For further percentage of replacement, there was substantial drop in compressive, flexural as well as tensile strength. The experimental results thereby indicates that utilisation of fly-ash as a partial replacement to micro silica up to 10 per cent in RPC is feasible and shows quite acceptable mechanical performance with the advantage of utilisation of fly-ash in replacement of micro-silica.

scholarly journals Evaluation of using crushed brick as coarse aggregate in concrete layer within rigid highway pavement

2018 ◽  
Vol 162 ◽  
pp. 01045
Author(s):  
Ali Alwash ◽  
Fatimah Al-Khafaji
Keyword(s):  
Coarse Aggregate ◽  
Partial Replacement ◽  
Experimental Investigations ◽  
Construction Technique ◽  
Rigid Pavement ◽  
Clay Bricks ◽  
Concrete Layer ◽  
Concrete Mix ◽  
Crushed Brick ◽  
Highway Pavement

Most of the present studies related to the field of highway pavement construction technique tend to make use of the local available materials as substitutes for the imported and necessary materials for some of the practical application. For this reason this research aims at looking for the prospect of used locally available aggregate such as crushed clay bricks for the aim of producing proper concrete with suitable thermal and mechanical properties. Experimental investigations have been carried out to asses the effect of partial replacement of coarse aggregate by free manually crushed Brick with percentages (10, 20, 30 and 40)% of virgin coarse aggregate in concrete mix for highway rigid pavement. While the percentage (0)% replacement represent reference mix. Mix proportion based on the target of compressive strength for all replacement percentage of (33) MPa at (28) days to achieve AASHTO requirement for highway concrete rigid pavement .The results of flexural strength, modulus of elasticity, density and thermal conductivity refers to better performance (less thickness of concrete layer with large spacing between contraction or expansion joints and less stresses due to warping induced concrete layer) for concrete mix with 20% crushed brick as replacement of coarse aggregate.

scholarly journals Evaluation on Improvement Zone of Foundation after Dynamic Compaction

2021 ◽  
Vol 11 (5) ◽  
pp. 2156
Author(s):  
Chong Zhou ◽  
Chenjun Yang ◽  
Hui Qi ◽  
Kai Yao ◽  
Zhanyong Yao ◽  
...  
Keyword(s):  
Sandy Soil ◽  
Ground Improvement ◽  
Soil Improvement ◽  
Dynamic Compaction ◽  
Impact Point ◽  
Weak Zone ◽  
Factors Affecting ◽  
Improvement Effect ◽  
Drop Number ◽  
Highly Correlated

Dynamic compaction (DC) is one of the most popular methods for ground improvement. To solve the problem of the factors affecting the sandy soil improvement effect and estimate the effective improvement range under DC, the influences of drop number, drop energy, tamping distance, tamper radius, and drop momentum on the relative degree of improvement were investigated. Three normalized indicators Δδz,i, ΔδA,i, and ΔδU,i were derived to evaluate the weak zone and corresponding improvement effect. For multipoint tamping, it is found that the improvement depth and the improvement of the weak zone are highly correlated with drop energy and drop momentum, while the influence of the drop number and tamper radius is relatively smaller. The improvement of the weak zone and the improvement depth decrease with tamping distance, whereas the improvement area increases with tamping distance. The soil compacted by the previous impact point will be improved to a lesser extent with impact at subsequent impact points. It is also noted that drop energy had better not exceed the saturated drop energy in DC design. Based on the parametric study, a formula considering the various factors of DC was put forward, with the validation by two field cases of DC.

scholarly journals EFFECT OF FIBER LENGTH VARIATIONS ON PROPERTIES OF COIR FIBER REINFORCED CEMENT-ALBUMEN COMPOSITE (CFRCC)

2011 ◽  
Vol 12 (1) ◽  
pp. 63-76 ◽  
Author(s):  
Zuraida Ahmad ◽  
Sopyan Iis ◽  
Zahurin Halim ◽  
Norshahida Sarifuddin
Keyword(s):  
Moisture Content ◽  
Water Absorption ◽  
Fiber Length ◽  
Partial Replacement ◽  
Experimental Investigations ◽  
Coir Fiber ◽  
Fiber Reinforced ◽  
Coir Fibers ◽  
Reinforced Cement ◽  
Cement Mixture

This paper evaluated the effect of fiber length on the mechanical and physical performance of coir fiber reinforced cement-albumen composites (CFRCC). Albumen protein was added as a binder and the coir fibers with the lengths of 0, 2.5, 5, 10 and 20 mm was used as partial replacement of the cement mixture. Flexural and compressive strength, bulk density, moisture content and water absorption were investigated. The experimental investigations reveal that increasing in length of fiber augment the flexural strength. Incorporation of long fiber into the cement paste however, decreased the workability and thus introduced voids which results in low density. In fact, the water absorption and moisture content were also increased.

scholarly journals Experimental Study on the Properties of Banyan Stalks Reinforced Concrete

2021 ◽  
Vol 9 (VII) ◽  
pp. 2535-2542
Author(s):  
S. Sri Charan
Keyword(s):  
Research Work ◽  
Hardness Test ◽  
Fibre Plant ◽  
Partial Replacement ◽  
Experimental Investigations ◽  
Ficus Benghalensis ◽  
Aerial Roots ◽  
In The Wild ◽  
Reinforcing Material ◽  
Main Component

In this developing country day by day technology increasing rapidly “According to the development there is an increasing in the construction process”. In construction the major role placed by concrete and steel. Due to wide ranging of steel usage the ore is also decreasing in the earth crust, so to avoid this type of scarcity or problems by using natural resources we can manufacture a fine quality reinforcing material for binding. In this process banyan tree stalks are the main component and we are not cutting the tree, just using AERIAL ROOTS of the banyan tree. If we cut them also, they can reproduce again by that tree. Banyan tree scientific name is “FICUS BENGHALENSIS” an annual fibre plant has been found to be an important source of fibers for a number of applications since good olden days. The banyan fibers has high potential as a reinforcing fiber and common home and office house tree, but in the wild forest, it’s a giant tree of Indian Jungles. Banyan tree starts out life as an epiphyte growing on another tree where some eating birds deposited seed. Banyan tree can get 100 inches tall and, with its massive limbs supported by prop roots, spread over an area of several acres. A famous banyan tree near Poona, (India) is said to measure a half mile around its perimeter and be capable of sheltering 2000 peoples. Banyan trees are native to India, Srilanka and Pakistan. The literature review and tests we are conducting has shown scanty information on the application of this fibers as reinforcing material, keeping in view the easy availability of this new and a comprehensive research work has been initiated in our laboratory on synthesis study of properties of banyan tree stalks as a reinforcing binding material by adding some resins. The composites provide characteristics that are not obtained from any discrete material systems and cohesive structures made by combining two or more compatible materials, the present work presents the results of experimental investigations carried out to evaluate the effect of partial replacement of steel in the construction. To check the properties of the prepared specimen by the banyan tree stalks, we are doing Laboratory Tests i.e., Tensile and Hardness test. The test strength at 7, 14, 28 days then comparing the values with the steel and also materials tests are to be performed.

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