Study of Compressive Strength of Self-compacting Concrete Using Rice Husk Ash and Nano Silica as a Partial Replacement to Cement: A Comparative Study

2021 ◽  
pp. 61-69
Author(s):  
Vijay Kumar ◽  
Shashi Ranjan Pandey ◽  
Aman Kumar
Keyword(s):  
Compressive Strength ◽  
Comparative Study ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Nano Silica ◽  
Self Compacting Concrete

Rice Husk Ash as Fine Aggregate Sustainable Material for Strength Enhancement of Conventional and Self Compacting Concrete

2016 ◽  
Vol 692 ◽  
pp. 94-103
Author(s):  
S.S. Samantaray ◽  
K.C. Panda ◽  
M. Mishra
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Fresh Concrete ◽  
Partial Replacement ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Self Compacting Concrete ◽  
Strength Enhancement ◽  
Slump Flow ◽  
Concrete Property

Rice husk ash (RHA) is a by-product of the rice milling industry. Near about 20 million tonnes of RHA is produced annually which creates environmental pollution. Utilization of RHA as a supplementary cementitious material adds sustainability to concrete by reducing CO2 emission of cement production. But, the percentage of utilization of RHA is very less. This paper presents the results of an experimental investigation to study the effects of partial replacement of fine aggregate with RHA on mechanical properties of conventional and self-compacting concrete (SCC). The fine aggregate is replaced by RHA in conventional concrete (CC) with six different percentage by weight such as 0%, 10%, 20%, 30%, 40% and 50% having w/c ratio 0.375 with variation of super plasticiser dose, whereas in SCC the replacement of fine aggregate by RHA is 0%, 10%, 20%, 30%, 40%. The design mix for CC is targeted for M30 grade concrete. The fresh concrete test of SCC is conducted by using slump flow, T500, J-ring, L-box, U-box and V-funnel to know the filling ability, flow ability and passing ability of SCC. As fresh concrete property concerned, the result indicates that the slump flow value satisfied the EFNARC 2005 guidelines upto 30% replacement of fine aggregate with RHA whereas 40% replacement did not satisfy the guideline. As hardened concrete property concerned, the compressive strength, split-tensile strength and flexural strength of CC and SCC are determined at 7, 28 and 90 days. The test result indicates that upto 30% replacement of fine aggregate with RHA enhances the strength in CC whereas the strength enhancement in SCC upto 20% replacement.

scholarly journals Effect of Rice Husk Ash (RHA) and Slag as Partial Replacement of Cement on Reinforced Concrete Slabs

2021 ◽  
pp. 34-40
Author(s):  
Mohamed Nabil ◽  
Ashraf Essa ◽  
Magdy Mahmoud ◽  
Mohamed Rabah
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Setting Time ◽  
Partial Replacement ◽  
Reinforced Concrete Slabs ◽  
Time Flow ◽  
Increasing Demand ◽  
Relationship Of ◽  
Compressive Tests

The increasing demand and consumption of cement have necessitated the use of slag, fly ash, rice husk ash (RHA), and so forth as a supplement of cement in concrete construction. The aim of the study is to develop a replacement of the cement with rice husk ash and slag combined with chemical activator. NaOH, Ca(OH)2, and KOH were used in varying weights and molar concentrations. Partial replacement of cement was tested for its consistency, setting time, flow, compressive strength, and fire. The consistency and setting time of the Partial Z-Cement (Zero cement) paste increase with increasing RHA content. The replacement of cement mortar achieves a compressive strength of 22–25MPa at  28 days with 5% NaOH or at 2.5or non used activator molar concentrations. The tested slabs were made of concrete and reinforced with bars with 10 mm diameter having and compressive strength evaluated from the compressive tests. The analysis of the slab deflection behavior has been presented after fire of samples. The results show the different character of the load-deflection relationship of a replacement of the cement with rice husk ash and slag reinforced slabs compared to traditionally reinforced slabs.  

scholarly journals Incorporation of Rice Husk Ash as Partial Replacement of Cement in M40 Grade Concrete

2021 ◽  
Vol 9 (9) ◽  
pp. 1444-1447
Author(s):  
Musaib Bashir Dar
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Cement Mortar ◽  
Cement Content ◽  
Research Work ◽  
Industrial Wastes ◽  
Partial Replacement ◽  
Alternative Materials

Abstract: In this developing era concrete and cement mortar are widely used by the construction industry, with this development. Large number of industrial wastes are generated and if these wastes are not properly used it will create severe problems, keeping the environment in mind, concrete engineers are trying to find some alternative materials which will not only replaces the cement content but also improves strength of concrete. As we also know that during the manufacturing of cement large amount of Co2 is released into the environment, but if we use such material that will replace the quantity of cement content therefore indirectly, we are contributing towards the prevention of our planet from global warming and other pollutions. Also, in this research work the Rice Husk Ash is used. the rice husk ash obtained from the rice processing units, by adding this product with concrete, not only replaces the cement content but also increases the strength of concrete like compressive strength etc. The Rice husk ash was incorporated with concrete with varying percentages of 2.5% ,5% ,7.5%, & 10%. the proper codal precautions were followed during the manufacture of concrete cubes of 150x150x150mm. it was concluded that the strength of concrete increased by incorporated the rice husk ash. Keywords: Concrete, RHA, Compressive strength, Industrial wastes, Cement etc

scholarly journals Study of Fly Ash, Rice Husk Ash and Marble Powder as Partial Replacement to Cement in Concrete

2020 ◽  
Vol 13 (3) ◽  
pp. 315-321
Author(s):  
Dhiraj Ahiwale ◽  
Rushikesh Khartode
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Flexural Strength ◽  
Rice Husk ◽  
Coarse Aggregate ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Scale Production ◽  
Environmental Threat ◽  
Marble Powder

Now days, the waste rice husk from rice mill, marble powder from tile industry and fly ash from steam power plant are necessary to utilize as partial replacement of cement for concrete production. Large scale production of cement required consumption of raw materials and energy as well as emissions to air which posse’s environmental threat in various areas of country. Apart from the environmental threat, there still exists the problem of shortage in many areas. Therefore, substitute material for concrete needs to be considered. The paper aims to analyze the compressive strength of concrete cubes and flexural strength of concrete beams made from partially replaced cement, sand, and coarse aggregate. This research study adopted in laboratory on 48 total specimens of grade M25 concrete cubes of size 150x150x150mm and concrte beams of size 100x100x500mm were casted. Out of the 48 concrete specimens cast, 6 each were made out 10%, 20%, and 30 % replacement of fly ash, rice husk ash and marble powder to cement in concrete. It was found that the compressive strength and flexural strength of concrete made from the mixture of 20 % partially replaced cement, sand and coarse aggregate was similar than the concrete made from without replaced cement , sand and coarse aggregate.

scholarly journals A Comparative Study on Behavior of Concrete to Partial Replacement of Cement by Rice Husk Ash and Glass Powder

IARJSET ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 30-36
Author(s):  
Dhawale Mr. G. D. ◽  
Makrande Dr .S. G. ◽  
Nikhar Mr.M.R.
Keyword(s):  
Comparative Study ◽  
Rice Husk ◽  
Glass Powder ◽  
Rice Husk Ash ◽  
Partial Replacement

Assessment of Rice Husk Ash (RHA) and Calcium Chloride (CaCl2) on Compressive Strength of Concrete Grade 20

2018 ◽  
Vol 40 ◽  
pp. 22-29
Author(s):  
Joseph A. Ige ◽  
Mukaila A. Anifowose ◽  
Samson O. Odeyemi ◽  
Suleiman A. Adebara ◽  
Mufutau O. Oyeleke
Keyword(s):  
Compressive Strength ◽  
Calcium Chloride ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Hardened Concrete ◽  
Conventional Concrete ◽  
Compressive Strength Test ◽  
Compressive Strength Of Concrete ◽  
Strength Result

This research assessed the effect of Nigerian rice husk ash (RHA) and calcium chloride (CaCl2) as partial replacement of cement in concrete grade 20. Rice husk ash (RHA) is obtained by combustion of rice husk in a controlled temperature. The replacement of OPC with rice husk ash (RHA) were 0%, 5%, 10%, 15% and 20%. 1% of Calcium Chloride was blended with OPC/RHA in all the test specimens except from control mix. Concrete cubes of sizes 150mm x 150mm x 150mm were cast and cured in water for 7, 14 and 28 days respectively. Slump test was conducted on fresh concrete while density test and compressive strength test were conducted on hardened concrete. The slump results revealed that the concrete becomes less workable (stiff) as percentage increases. The compressive strength result at 28 days revealed that 5%RHA/1%CaCl2 have the highest strength of 26.82N/mm2 while 20%RHA/1%CaCl2 have the lowest strength (21.48N/mm2). Integration of 5%RHA/1%CaCl2 and 10%RHA/1%CaCl2 as cement replacement will produce a concrete of higher compressive strength compared to conventional concrete in grade 20 concrete.

scholarly journals Utilization of Rice Husk Ash in Reactive Powder Concrete

2019 ◽  
Vol 8 (4S2) ◽  
pp. 82-86
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Curing Temperature ◽  
Partial Replacement ◽  
High Price ◽  
Reactive Powder Concrete ◽  
Durability Properties ◽  
Reactive Powder

Reactive Powder Concrete (RPC) is a special concrete with excellent mechanical and durability properties and it is differentiated with other forms of concrete in terms of production, mix proportion etc. Depending upon various parameters like composition and the curing temperature, its compressive strength ranges from 130 MPa to 750 MPa, bending strength varies as 29 to 51 MPa and Young's modulus results upto 50GPa to 75GPa.Though RPC possesses many outstanding properties, it has limited applications in the construction field. The usage of higher quantity of cement and Silica Fume causes the rise of production of RPC. In addition to that, the silica fume availability is also restricted. For a country like India, usage of SF is limited due to its high price. Also, mineral admixtures can be used as a suitable alternative. Hence in this research work, Rice Husk Ash (RHA) is used as a possible alternatives for replacing silica fume in RPC. RHA holds maximum amount of silica (approx. 96%) in amorphous form. In this research, an experimental research on mechanical and durability properties of RPC by partially replacing SF with RHA. The detailed literature survey on constituent materials, mix proportions and curing conditions of RPC were done. Also, the optimum temperature and duration for the thermal treatment of RHA were identified. The compressive strength of the specimens of partial replacement of Silica Fume using RHA were tested and the results were compared with control specimens compressive strength.

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