Effect of limestone powder on self-compacting concrete

Self-compacting concrete (SCC) is an innovative construction material in the construction industry. It is a highly fluid and stable concrete that flows under its own weight and fills completely the formwork. The SCC requires high powder content (mainly of cement) up to 600kg/ to achieve its properties. This will be problematic because increasing the cement content is not feasible, and may cause high cost and some other technical problems such as higher heat of hydration and higher drying shrinkage. This paper investigates the effect of limestone powder (LSP) on fresh and hardened properties of SCC due to the use of LSP as a partial cement replacement. For comparison, a control sample of concrete was prepared without LSP to compare it with the various samples containing different percentages of LSP as a partial replacement of cement. Four mixes with a constant amount of (superplasticizer, sand, coarse aggregate, and water) at various replacement levels of 0%, 10%, 20% and 30% from the cement weight were prepared. The experimental results show that the LSP can be effectively used as a partial cement replacement on SCC to reduced cost and enhanced the performance of SCC in fresh and hardened stages.

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Utilization of Self-Consolidated Green Material for Sustainable Development: An Environment Friendly Waste Materials Application for Circular Economy

Polymers ◽

10.3390/polym13172985 ◽

2021 ◽

Vol 13 (17) ◽

pp. 2985

Author(s):

Syyed Adnan Raheel Shah ◽

Hassam Ahmad ◽

Hatem Alhazmi ◽

Muhammad Kashif Anwar ◽

Fahad Iqbal

Keyword(s):

Mechanical Properties ◽

Flexural Strength ◽

Circular Economy ◽

Construction Material ◽

Waste Materials ◽

Partial Replacement ◽

Infrastructure Development ◽

Self Compacting Concrete ◽

Destructive Testing ◽

Green Materials

Self-Compacting Concrete (SCC) is a unique kind of concrete that tends to consolidate in terms of its weight. In this study, the prime target is to investigate the durability properties of SCC developed using eco-friendly economical waste binding materials as partial replacement to costly cement. This circular economy concept will not only help in the development of green concrete but will also help to improve the climatic condition by reducing the use and production of cement. An economical design methodology has been applied to produce environmentally friendly construction material. This research focuses on the application of Alum Sludge (AS) and Brick Dust (BD) in Self-Compacting Concrete (SCC). Both materials are waste materials containing binding properties. Performance of SCC developed using these two materials was tested considering mechanical properties of concrete using the destructive testing technique. Results showed that BD and AS can be utilized for up to 12% and 9% of replacement of cement, respectively, to achieve equal or higher compressive, tensile, and flexural strength. The application of BD and AS has demonstrated a subsequent improvement of SCC’s mechanical properties, i.e., compressive, tensile, and flexural strength. This study will help the production of composite green materials with the help of eco-friendly and economical waste materials for sustainable infrastructure development.

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Long-Term Behavior of Low-Heat Cement Concrete under Different Curing Temperatures

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.723.819 ◽

2016 ◽

Vol 723 ◽

pp. 819-823 ◽

Cited By ~ 1

Author(s):

Jae Sung Mun ◽

Keun Hyeok Yang ◽

Si Jun Kim

Keyword(s):

Drying Shrinkage ◽

Curing Temperature ◽

Limestone Powder ◽

Partial Replacement ◽

Mass Concrete ◽

Test Results ◽

Long Term Behavior ◽

Ambient Curing ◽

Ternary Blended Concrete

The present study is to estimate long-term characteristics of low-heat cement-based ternary blended concrete prepared for reducing hydration heat in mass concrete. 15% modified fly ash and 5% limestone powder were added for partial replacement of the low-heat cement. To achieve the designed compressive strength of 42 MPa, water-to-binder ratios were determined to be 27.5, 30 and 32.5% for ambient curing temperatures of 5, 20 and 40°C, respectively. Test results showed that, with the decrease in curing temperature, the drying shrinkage strains tended to decrease, whereas creep strain increased.

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Effect of internal curing on performance of self-compacting concrete by using sustainable materials

MATEC Web of Conferences ◽

10.1051/matecconf/201816202017 ◽

2018 ◽

Vol 162 ◽

pp. 02017

Author(s):

Nada Aljalawi ◽

Amar Yahia AL-Awadi

Keyword(s):

Compressive Strength ◽

Lightweight Aggregate ◽

Internal Curing ◽

Modulus Of Rupture ◽

Limestone Powder ◽

Partial Replacement ◽

Hardened Concrete ◽

Self Compacting Concrete ◽

Curing Conditions ◽

Compressive Strength Test

This paper is devoted to investigate the effect of internal curing technique on the properties of self-compacting concrete. In this study, self-compacting concrete is produced by using limestone powder as partial replacement by weight of cement with percentage of (5%), sand is partially replaced by volume with saturated fine lightweight aggregate which is thermostone aggregate as internal curing material in three percentages of (5%, 10%, 15%) for self-compacting concrete, and the use of two external curing conditions which are water and air. The experimental work was divided into three parts: in the first part, the workability tests of fresh self-compacting concrete were conducted. The second part included conducting compressive strength test and modulus of rupture test at ages of (7, 28 and 90) days. The third part included doing the shrinkage test at age of (7, 14, 21, 28) days. The results show that internally cured self-compacting concrete has the best workability and the best properties of hardened concrete which include (compressive strength, modulus of rupture) of externally cured self-compacting concrete with both water and air as compared with reference concretes. Also, the hardened properties of internally cured self-compacting concrete with percentage of (5%) with thermostone aggregate is the best as compared with that of percentages (10% and 15%) in both external curing conditions. In general, the results of shrinkage test have shown reduction in shrinkage of internally cured self-compacting concrete as compared with reference concretes and this reduction increases with increase in the thermostone aggregate content-within-self-compacting-concrete.

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Mechanical behaviour of self compacting concrete: Effect of wood ash and coal ash as partial cement replacement

Materials Today Proceedings ◽

10.1016/j.matpr.2021.01.311 ◽

2021 ◽

Vol 42 ◽

pp. 1470-1476

Author(s):

Javed Ahmad Bhat

Keyword(s):

Mechanical Behaviour ◽

Coal Ash ◽

Wood Ash ◽

Self Compacting Concrete ◽

Cement Replacement ◽

Partial Cement Replacement

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Use of Materials with Pozzolanic Properties as Partial Cement Replacement in Development of Heat Resistant Composite

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.827.316 ◽

2016 ◽

Vol 827 ◽

pp. 316-319

Author(s):

Marcel Jogl ◽

Jaroslava Koťátková ◽

Pavel Reiterman

Keyword(s):

Ceramic Powder ◽

Partial Replacement ◽

Structural Elements ◽

Cement Production ◽

Cement Replacement ◽

Binder Component ◽

Energy Consuming ◽

Aluminous Cement ◽

Partial Cement Replacement ◽

Pozzolanic Properties

Cement is an extremely energy consuming material and its production leads to the emission of a vast amount of greenhouse gases. Cementitious concrete is a universal building material, which is used for the production of various structural elements. The paper describes the problem of cement production and its impact on the environment. This research deals with application of aluminous cement as binder component for the manufacture of refractory composites and with possibilities of further utilization of environmentally friendly materials with pozzolanic properties as a partial replacement of used aluminous cement. These materials are originating as waste in the building industry or by the recycling of cast-off materials. To reduce the costs and adverse effects on the environment was the binder system modified by finely ground ceramic powder and metakaolin. The experimental results present the values of flexural and compressive strength investigated on a series of composite specimens with dimensions of 40×40×160 mm3 and 10, 20 and 30 % of cement replacement. The aim of the present work is to apply the mentioned pozzolanic materials and reach the suitable composite with the sufficient heat resistance and residual mechanical parameters after gradual temperature loading.

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Mechanical Properties and Microstructure of Oil Palm Fiber (OPF) Partial Replacement of Cement

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.861.482 ◽

2020 ◽

Vol 861 ◽

pp. 482-487

Author(s):

Gunalaan Vasudevan

Keyword(s):

Compressive Strength ◽

Flexural Strength ◽

Water Absorption ◽

Oil Palm ◽

Partial Replacement ◽

Palm Fiber ◽

Cement Replacement ◽

Partial Cement Replacement ◽

Oil Palm Fibre ◽

Palm Fibre

This research showed the results of experiments effect use of oil palm fibre (OPF) from oil palm industry as partial replacement for ordinary Portland cement. Research on the reuse of waste materials in the concrete industry has been quite intensive in the past decade. The objective of this research is to identify the Effect of oil palm fibre as a partial cement replacement in the production of concrete. After the treatment, the economical ways to dispose of it is by using landfill method. But due to a limited landfill site in Malaysia and it is the temporary solution for the disposal of the waste, it becomes a problem to Malaysia and the number of the oil palm fibre keeping increase year by year because of the population increase year by year too. The results showed that oil palm fibre (OPF) greatly improved the compressive and flexural strength of concrete. The rate of water absorption of oil palm fibre (OPF) concrete was reduced as oil palm fibre filled up the existing voids, making it more impermeable. However, the compressive strength of the oil palm fibre concrete decreases gradually when the amount of oil palm fibre (OPF) increased. It can be concluded that the optimum percentage of oil palm fibre as a partial cement replacement is 10%. In this direction, an experimental investigation of ultrasonic pulse velocity, carbonation test, compressive strength, flexural strength and water absorption was undertaken to use oil palm fiber and admixtures as partial replacement for cement in concrete.

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An Investigation on Compressive Strength of Concrete Blended With Groundnut Shell Ash

Neutron ◽

10.29138/neutron.v21i1.87 ◽

2021 ◽

Vol 20 (2) ◽

Author(s):

Abdul Wahab Abro ◽

Aneel Kumar ◽

Manthar Ali Keerio ◽

Zubair Hussain Shaikh ◽

Naraindas Bheel ◽

...

Keyword(s):

Carbon Dioxide ◽

Compressive Strength ◽

Construction Material ◽

Partial Replacement ◽

Cement Replacement ◽

Compressive Strength Of Concrete ◽

Groundnut Shell ◽

Carbon Dioxide Co2 ◽

Strength And Durability ◽

Groundnut Shell Ash

Concrete is frequently utilized infra-structural construction material all over the world. Cement is the main part of the concrete, during its manufacturing emission of gases such as carbon dioxide (CO2) from cement factories create greenhouse effect. In these days various natural pozzolanic materials are used as partial replacement of cement to enhance strength and durability and to reduction in consumption of cement consequently reduction in carbon dioxide (CO2) emission. The aim of this research is to investigate the effect of groundnut shell ash as a cement replacement material on workability and compressive strength of concrete. One mix of ordinary concrete and five mixes of modified concrete were prepared, where cement is replaced by groundnut shell ash from 3% to 15% by weight of cement, with 3% increment with 1:2:4 binding ratio mixed with 0.5 water/cement ratio. The workability and compressive strength of concrete was investigated. The obtained outcomes demonstrated that, groundnut shell ash as a cement replacement material have significant effect on compressive strength of concrete.

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