International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 06 | June 2023
p-ISSN: 2395-0072
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Study on Strength and Durability Properties of Self-Compacting Mortar using different Mineral Admixtures and Macro-Synthetic Fibers Ashwini Ramesh Patil1, S. Bhavanishankar2 1PG Student, Dept. of Civil Engineering, University Visvesvaraya College of Engineering, Bengaluru, India 2Associate Professor, Dept. of Civil Engineering, University Visvesvaraya College of Engineering, Bengaluru, India
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Abstract – An experimental study has been conducted to
appropriate mortar. Therefore, mortar plays a very important role on the workability characteristics of SCC and these properties might be investigated by examining the selfcompacting mortar (SCM). In fact, examining the qualities of SCM is an inherent aspect of SCC design.
examine the characteristics of self-compacting mortar (SCM). Employing macro-synthetic fibers as well as mineral admixtures like fly ash and silica fume, SCM have been investigated for fresh, hardened and durability properties. A standard SCM mix i.e., 100% cement is developed in the current study while maintaining good flowability. 16 SCM mortar mixes with varying percentages of Fly ash and Silica fume, with and without adding Macro-synthetic fibers, are designed in order to evaluate the effects of mineral admixture and Macro-synthetic fibers on SCM. Self-compacting mortar's fresh properties, such as mini-slump flow and mini-v-funnel flow time, are studied both with and without the addition of macro-synthetic fibers and hardened Properties like compressive and flexural strength as well as durability property such as drying shrinkage are studied. The selfcompacting mortar mix specimens with and without the addition of macro-synthetic fibers are cast, cured and tested for 7 days and 28 days in order to assess the compressive strength and flexural strength. The self-compacting mortar specimens with and without the addition of macro-synthetic fibers are cast, cured in water for three days and then airdried for the remaining days. The test is repeated every five days up to thirty days to determine drying shrinkage. Conclusions are drawn based on the results obtained from the investigation.
On the other hand, use of finely divided mineral admixtures in SCC reduces the cost of SCC. As most of the mineral admixtures available in the market are generally, byproducts obtained from manufacturing industries. Mineral admixtures replace cement without compromising the properties of concrete. Moreover, the mineral admixtures will also boost the strength and durability properties of concrete.
2. OBJECTIVES OF PRESENT STUDY •
In the lab, mixes for self-compacting mortar (SCM) are being developed.
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The Mini-slump flow diameter tests and Mini V-funnel tests (with and without fibers) are used to analyze the properties of fresh mortar.
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To determine the hardened properties of SCM mortar, compressive strength and flexural strength tests (with and without fibers) are carried out.
Key Words: Self Compacting Mortar, Macro-synthetic fibers, Fresh Properties, Compressive Strength, Flexural Strength, Drying Shrinkage.
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To determine the durability properties of SCM, drying shrinkage tests (with and without fibers) were performed.
1. INTRODUCTION
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Conclusions are drawn based on the results obtained.
Self-compacting concrete (SCC) has been in use for the past two decades. SCC was first discovered in 1986 by Japanese researchers to increase concrete durability by increasing the workability of concrete and hence by increasing the building quality. SCC is defined as concrete with very high flowability coupled with good stability. These two characteristics allow the concrete to fill every corner of the formwork by its own weight without the requirement of any external vibrators. Another quality that is always needed for SCC is its passing ability that is needed for filling extremely congested areas of reinforced concrete constructions.
3. METHODOLOGY
The standard technique to produce self-compatibility is to minimize the coarse aggregate content and use an
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The use of mineral admixtures like fly ash and silica fume to replace cement in SCM mixes is examined in several literature reviews.
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Prior to casting, calculate the material requirements for various mix proportions and carry out various preliminary material tests.
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Cement mortar with mix ratio 1:2 is being taken into consideration for the current investigation. Fly ash and Silica fume are used as mineral admixtures, along with M sand as a fine aggregate and macro-synthetic fibers as a fiber.
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