International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 08 | Aug 2023
p-ISSN: 2395-0072
www.irjet.net
A STUDY ON SELF CURING CONCRETE USING SODIUM LIGNOSULPHONATE BY PARTIALLY REPLACING CEMENT WITH GGBS ANGEL JOSE1, DILSHANA A.K2, ASIF MUHAMMED P.S3, AMBROSE GEORGE ANTONY K.V4 1,2,3,4 UG Students, Department of Civil engineering, KMEA Engineering College, Kerala, India.
---------------------------------------------------------------------***--------------------------------------------------------------------using self curing agents, reduces the excessive evaporation of Abstract – Self curing concrete is designed to maintain water from the concrete and increases the water retention capacity. Thus it solves the problem of water deficiency for curing and it is an effective method for curing concrete. Thus save the amount of water used in construction industry.
adequate moisture within the concrete mix and to cure itself without the need for external water curing. And also aid to ensure proper hydration and strength development. Sodium lignosulphonate can be used as water reducing agent, helping to maintain a consistent moisture level within the concrete. sodium lignosulphonate act as plasticizer and improves the workability of concrete mix. This leading to a more homogeneous mixture, which can contribute to better moisture distribution throughout the concrete mix. Thus it doesn’t require additional water for curing. This self curing agent has water retaining property and allow the concrete to self cure over time. In this experimental study cement has been partially replaced with GGBS. By using GGBS ensures resource conservation, reduces carbon emission, enhances workability and reduces heat of hydration. Incorporation of GGBS makes the concrete more sustainable and contributing to a greener construction industry. The aim of this investigation is to study the strength of concrete using Sodium Lignosulphonate (NaLS) as self-curing agent. In this study, compressive strength, split tensile strength and flexural strength of concrete containing self-curing agent is investigated and compared with those of conventionally cured concrete. Self-curing agent NaLS (0.5%, 1%, and 1.5%) were added and also cement has been partially replaced with 10% of GGBS. Their strength properties were studied and compared with control mix.
2. MECHANISM OF SODIUM LIGNOSULPHONATE AS SELF CURING AGENT NaLS is used as water-reducing and self curing agent in concrete, but it does not undergo a chemical reaction when added to the concrete mixture. The NaLS molecules have a negatively charged surface which allows them to adsorb onto the surface of cement particles, forming a protective layer around them. This layer prevents the particles from coming into contact with each other and forming large aggregates, which would increase the viscosity of the mixture. The NaLS can disperse in the water, forming electrostatic repulsion with the cement particles and reducing the attractive forces between them. This helps to keep the particles in a more fluid state, allowing the concrete to flow more easily into molds and forms. The addition of NaLS as a self curing agent in concrete works to modify the physical properties of the mixture. On hardened concrete NaLS reacts with the free lime (CaO) present in the concrete to form insoluble calcium lignosulphonate. This creates a barrier within the concrete that helps to retain moisture, which is essential for the continued curing of the concrete. NaLS can penetrate the surface of the concrete and helps to strengthen the bonds between the cement particles. This can lead to an increase in compressive strength and a reduction in the permeability of the concrete.
Key Words: Self curing, Compressive strength, Split tensile strength, Flexural strength, GGBS, Sodium Lignosulphonate
1.INTRODUCTION
3. OBJECTIVE
Curing of concrete is the process of maintaining adequate moisture content and temperature in concrete. This is done to ensure proper hydration and strength development. If curing is not provided at the right time, this may lead to shrinkage of concrete and results in cracking, reduces durability and may not achieve desired properties for the concrete structure. Different methods of curing involve water curing, curing using chemical compounds, steam curing, membrane curing etc. Water curing is widely used method to cure the concrete. Construction requires huge amount of water for their work and large amount of water is wasted. But availability of water may not be assured in every region. So water curing cannot be conducted in water deficit areas. In order to reduce this problem, self curing agents are used. By
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To study the mechanical properties of self -curing concrete using sodium lignosulphonate. (Compressive strength, split tensile strength, flexural strength). To find the optimum lignosulphonate.
percentage
of
Sodium
To develop a sustainable building material by partial replacement of cement with GGBS.
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