Study on Mechanical Properties of Light Weight Vermiculite Concrete by Partially Replacing Cement with GGBS and Dolomite

Abstract

This research aims to determine the mechanical properties of light weight vermiculite concrete of M30 grade by partial replacement of cement with GGBS and Dolomite In this study two different concrete mixes were prepared with partial replacement of cement with 40% of GGBS and fine aggregate with varying proportions of vermiculite of 0%,5%, 10%,15%,20% and 25% and another set of concrete mixes were prepared with partial replacement of cement with dolomite of 30% and fine aggregate with varying proportions of vermiculite of 0%,5%,10%,15%,20% and 25%.

Introduction

I. INTRODUCTION

The construction unit is one among the greatest end user of unprocessed materials contemporary. To bear further demand it is necessary for a drastically reduce the consumption of materials in turn now lightweight concrete (LWC) is used in structures to diminish the dead load. Comprehensively. Considering the above the aggregates have been replaced with light weight aggregates like perlite, pumice, expanded clay, vermiculite dolomite etc. which on contrarily develops good mechanical and durable concrete. This paper direct to evaluate the researches to know durability aspects of light weight concrete using vermiculite as aggregate which possess the strength required.

II. LITERATURE REVIEW

A. M.V.S.S. Sastry, P.Ashveen Kumar, K.Jagannadha Rao (2018)

In this experimental investigation, the mechanical aspects of M20 grade concrete with varying percentages vermiculite at a extent of 0-100% with an addition of 20% as limited replacement with vermiculite to the absolute weight of fine aggregate(sand) along with mineral admixtures such as Ultra-fine Fly ash (UFA) and micro silica (SF) is reinstated with cement by disparate percentages i.e., from 5-15%, and Micro silica (SF) at 5%, 10% and 15% by gross weight of cement. The compressive strength no matter when is declining due to reinstatement of Exfoliated Vermiculite (EV), but a cost effective design was retrieved with 20% replacement to sand (fine aggregate).

B. M. Preethi, P. Ashveen Kumar, M.Hamraj(2021)

The present study focuses on the preparation of M30 grade concrete by replacing fine aggregate with 0%,5%,10%,15%,20%,25% of vermiculite and cement with 0% and 10% of constant silica fume to improve the performance of concrete. In the present study, an attempt is made to study the effect on acid exposure on strength and weight of concrete through experimentation. Concrete cubes of different mixes(12Nos) are casted and exposed to sulphuric acid of (pH=3). Cubes of size 100mm x 100mm x 100mm are cast with M30 grade of concrete, following which the cubes are immersed (cured) in water for 28 days. Next, the cubes are immersed in and sprayed with 4% concentrated Sulphuric acid for 7 days.

The cured cubes are then tested under compressive testing machine to determine their compressive strength Also, this project investigates the effects of FOSROC CONPLAST SP430, a water reducing super plasticizer on compressive strength and weight of concrete.

C. M.Preethi, P. Ashveen Kumar, M.Hamraj(2021)

This paper aimed to compare the mechanical aspects of light weight concrete of M30 concrete with and without silica fume as replacement to cement by 10% along with sand as partial replacement of 0%, 5%, 10%,15%,20%and 25%variations of vermiculite.Specimens are tested for compressive strength using 10cm x 10cm x 10cm cubes for 7, 14 and 28 days flexural strength was determined by using 10cm x 10cm x 50cm prisms at 28 days and split tensile strength is determined using 15cm diameter and 30cm height cylinder specimens at 28 days The test show that it is possible to produce a natural light weight concrete with increase in mechanical properties using vermiculite and silica fume.

D. M.Preethi,P.Ashveen Kumar, M. Hamraj(2021)

The research study purpose is on the preparation of M30 grade concrete by partial replacement of fine aggregate with 0% to 25% of vermiculite with an increment of 5% and cement with 0% and 10% of constant silica fume to promote the achievements of concrete. In this experimental work an effort is made to know the effect of HCL acid exposure on strength and weight of concrete. Concrete cubes of different mix proportions are prepared and exposed to hydrochloric acid of (pH=5). Cubes of size 100mm x 100mm x 100mm are cast for M30 grade of concrete, following which the cubes are cured in water for 28 days. Next, the cubes are immersed with 4% concentrated Hydrochloric acid for 7 days in curing drum maintaining a pH of 5. The cured cubes are then tested for weight and to determine their compressive strength. Also, this project investigates the effects of FOSROC CONPLAST SP430, water reducing super plasticizer on compressive strength and weight of concrete.

III. RESULTS

The experimental setup is prepared to determine the mechanical properties of   M30 grade concrete by partial replacement of fine aggregate with 0% to 25% of vermiculite with an increment of 5% and cement with GGBS and Dolomite.  In this study two different concrete   mixes are prepared M1 – M6   for replacement of cement   with GGBS and M7 – M12   for replacement of   cement with   Dolomite.

Table 1: Basic proportions of materials for cement with GGBS replacement

Table 2: Basic proportions of materials for cement with Dolomite replacement

Table 3: Compressive Strength at 28 days (replacement of cement with GGBS)

Table 4: Compressive Strength at 28 days (replacement of cement with Dolomite)

Table 5: Split Tensile Strength for 28 days (with GGBS replacement)

Table 6: Split Tensile Strength for 28 days (with Dolomite replacement)

Table 7: Flexural Strength for 28 days (replacement of cement with GGBS)

Table 8: Flexural Strength for 28 days (replacement of cement with Dolomite)

Conclusion

A. Strength with 5 and10% replacement of fine aggregate with vermiculite and 40% replacement of cement with GGBS and 30% replacement of cement with dolomite had given good strength. B. On comparison of GGBS and dolomite it was found that maximum strength is obtained using GGBS C. Compressive strength was found to be increased compared to conventional concrete. D. Mechanical aspects decreased with increase of percentage of vermiculite beyond 10% when used as replacement to fine aggregate. E. On comparison it was found with increase of vermiculite as replacement fine aggregate reduced the weight of concrete mixes making concrete Light weight concrete s. F. It was found that usage of Dolomite as replacement to cement gives although gave less compressive strength but gave considerable increase in flexural and split tensile strength when compared with replacement of GGBS.

References

[1] M.Preethi, M.Hamraj and P.AshveenKumar “A Review on Lightweight Vermiculite Concrete”, Solid State Technology, Vol 63, No 4 (2020). [2] M.Preethi, P.Ashveen Kumar and M.Hamraj “Strength Characteristics of High Strength Concrete (HSC) with and without Coarse Aggregate (2019)”, International Journal of Engineering and Advanced Technology, ISSN vol. 9 (2019). [3] M.V.S.S.Sastri, P.Ashveen Kumar and K.Jagannadha Rao“Experimental Investigation on Strength Properties of Ultrafine Fly ash and Micro Silica as Mineral Admixtures for Vermiculate Mortar (2019)”, under publication in i-manager’s Journal on Material Science (JMS). [4] M.Preethi, P.Ashveen Kumar and M.Hamraj “Effect of HCL at early ages for light weight vermiculite concrete of HCL at early ages for light weight vermiculite concrete (2021)”, International Journal of Research and Analytical Reviews, vol. 8 (2021). [5] M. Preethi, P. Ashveen Kumar and M.Hamraj “Strength And Durability Test (Sulphate Attack) On Light Weight Concrete By Partial Replacement of Vermiculite For Fine Aggregate And Silica fume For Cement (2021)”, International Journal of Engineering Applied Sciences and Technology, 2021 Vol. 5, Issue 12, ISSN No. 2455-2143, Pages 140-146. [6] M.Preethi, P. Ashveen Kumar and M. Hamraj “Study On Concrete with Replacement Of Fine Aggregates By Vermiculite And Cement By Silica Fume” (2021), Vidya Bharati International Interdisciplinary Research Journal 2021, Pages 2497 – 2503. [7] P. Sundar Kumar, M.J.RatnaKanthBabu, K. Sundara Kumar and K. Satish Kumar “Experimental Study on Lightweight Aggregate Concrete”, International Journal of Civil Engineering Research, Vol. 1(2010). [8] F Koksal,O Gencel, W Brostow and H E HaggLobland “Effect Of High Temperature on Mechanical and Physical Properties of Lightweight Cement Based Refractory Including Expanded Vermiculite”, Journal of Materials Research Innovations, Vol. 16 (2012).

Copyright

Copyright © 2022 M. Preethi, Md. Hamraj, P. Ashveen Kumar. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.