scholarly journals Influence of calcined mud on the mechanical properties and shrinkage of self-compacting concrete

2018 ◽  
Vol 149 ◽  
pp. 01026
Author(s):  
Taieb Fatima ◽  
Belas Nadia ◽  
Belaribi Omar ◽  
Belguesmia Khalil ◽  
Hadj Sadok Rachid
Keyword(s):  
Mechanical Properties ◽  
Cement Content ◽  
Partial Replacement ◽  
Self Compacting Concrete ◽  
Fresh State ◽  
Beneficial Impact ◽  
Mineral Additions ◽  
Mechanical Strengths ◽  
Specific Formulation ◽  
Dredging Sediments

The use of SCC has a particular interest in terms of sustainable development. Indeed, their specific formulation leads to a greater volume of dough than for common concretes, thus, a larger quantity of cement. However, for economical, ecological and technical reasons, it is sought to limit their cement content [1]. It is therefore necessary to almost always use mineral additions as a partial replacement for cement because the technology of self-compacting concretes can consume large quantities of fines, in this case calcinated mud issued from dams dredging sediments that can give and/or ameliorate characteristics and performances of this type of concretes. Four SCCs had been formulated from the same composition where the only percentage of calcinated mud of Chorfa (west of Algeria) dam changed (0%, 10%, 20% and 30%). The effect of calcinated mud on characteristics at fresh state of SCC according to AFGC was quantified. Mechanical strengths and shrinkage deformation (total, autogenous, drying) were evaluated. The results show the possibility to make SCCs with different dosages of calcinated mud having strengths that can defy those of the control SCC. The analysis of free deformations indicates the beneficial impact of the mud by contributing to decrease the amplitudes of the shrinkage compared to those of the control SCC.

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

Polymers ◽  
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.

Effective Utilization of Industrial and Agricultural Waste for Developing Sustainable Self-Compacting Concrete

2022 ◽  
Vol 1048 ◽  
pp. 376-386
Author(s):  
M.S. Riyana ◽  
Dhanya Sathyan ◽  
M.K. Haridharan
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Portland Cement ◽  
Rice Husk ◽  
Ordinary Portland Cement ◽  
Rice Husk Ash ◽  
Cement Content ◽  
Supplementary Cementitious Materials ◽  
Ternary Blend ◽  
Self Compacting Concrete

SCC (Self compacting concrete) can fill formwork and encloses reinforcing bars under gravity and maintains homogeneity without vibration. SCC shortens the period of construction, guarantees compaction in confined zones, moreover terminates noise due to vibration. The wide spread application of SCC is restricted because of the high cost for the production of SCC with high cement content and chemical admixtures. In order to make the production of SCC economical, and to reduce the high cement content the Ordinary Portland Cement in SCC can be blended with pozzolanic materials like rice husk ash and supplementary cementitious materials like fly ash. In this paper the fresh state properties and mechanical properties such as compressive strength, split tensile strength and flexural strength of SCC with ternary blends of rice husk ash (RHA) and fly ash (FA) were studied. For this purpose, different mixes were prepared by replacing Ordinary Portland Cement (OPC) with 5%, 10%, 15% and 20% of rice husk ash (RHA) and the percentage of addition of fly ash (FA) is fixed as 15% for all these mixes. It was observed that the specimen incorporating 10% of rice husk ash (RHA) and 15% of fly ash (FA) as ternary blend exhibits better mechanical properties such as: Compressive, split tensile and flexural strengths at 28 days of age as compared to traditional mix of SCC without RHA (Rice Husk Ash) and FA (Fly Ash). This research demonstrates that the ideal percentage for a mixture of rice husk ash (RHA) and fly ash as ternary blend is 10% and 15% respectively.

scholarly journals Fresh State and Mechanical Properties of Self Compacting Concrete Incorporating High Volume Fly Ash

2016 ◽  
Vol 47 ◽  
pp. 01001
Author(s):  
N. Mohamad ◽  
M. S. Zulaika ◽  
A. A. A. Samad ◽  
W. I. Goh ◽  
J. Hadipramana ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
High Volume ◽  
Self Compacting Concrete ◽  
High Volume Fly Ash ◽  
Fresh State

scholarly journals Durability Properties Of M60 GradeSelf-Compacting Concrete With Partial Replacement Of Cement by GGBS, Lime Powder and Metakaolin

2019 ◽  
Vol 8 (3) ◽  
pp. 7717-7720
Keyword(s):  
Cement Content ◽  
Partial Replacement ◽  
Self Compacting Concrete ◽  
Durability Properties ◽  
Curing Period ◽  
High Durability ◽  
Super Plasticizer ◽  
Acid Environment ◽  
Lime Powder ◽  
Passing Ability

In this investigation the Durability Properties of M60 grade Self compacting concrete (SCC) with partial replacement of cement by GGBS, Lime powder, and Metakaolin. Five mixes were prepared at 25% replacement of cement content with different admixture (.i.e.M1, M2, M3, M4&M5) at 0.34 w/c ratio and 1% super plasticizer dosage by cement content for maintaining required workability. Filling and passing ability were found out by slump test, V-funnel, L-box and U-box before casting the specimens. In this investigation M60 grade designed by means of Nansu method by fulfilling EFNARC guidelines for SCC. Durability properties tested under acid environment with H2SO4 and HCl and Sulphate environment with MgSO4 and Na2SO4 at curing period of 28 days. In this investigation the Lime-powder based mixes shows high durability comparatively to Metakaolin as well as addition of GGBS maintained sufficient compressive strengths

scholarly journals Photocatalytic Activity and Mechanical Properties of Cements Modified with TiO2/N

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3756 ◽  
Author(s):  
Magdalena Janus ◽  
Szymon Mądraszewski ◽  
Kamila Zając ◽  
Ewelina Kusiak-Nejman ◽  
Antoni W. Morawski ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Photocatalytic Activity ◽  
Building Materials ◽  
Cement Content ◽  
Setting Time ◽  
Cement Matrix ◽  
Final Setting Time ◽  
Cement Mortars ◽  
Fresh State ◽  
Positive Effect

In this paper, studies of the mechanical properties and photocatalytic activity of new photoactive cement mortars are presented. The new building materials were obtained by the addition of 1, 3, and 5 wt % (based on the cement content) of nitrogen-modified titanium dioxide (TiO2/N) to the cement matrix. Photocatalytic active cement mortars were characterized by measuring the flexural and the compressive strength, the hydration heat, the zeta potential of the fresh state, and the initial and final setting time. Their photocatalytic activity was tested during NOx decomposition. The studies showed that TiO2/N gives the photoactivity of cement mortars during air purification with an additional positive effect on the mechanical properties of the hardened mortars. The addition of TiO2/N into the cement shortened the initial and final setting time, which was distinctly observed using 5 wt % of the photocatalyst in the cement matrix.

scholarly journals Effect on the Mechanical Properties of Self-Compaction Concrete by Partial Replacement with Grinded Fibers

2019 ◽  
Vol 9 (2) ◽  
pp. 588-592
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Construction Industry ◽  
Volume Fraction ◽  
Basalt Fiber ◽  
The Self ◽  
Partial Replacement ◽  
Equal Proportion ◽  
Self Compacting Concrete ◽  
Split Tensile Strength

The development of Self-compacting concrete (SCC) is a progressive milestone in the historical backdrop of real estate and construction industry bringing about transcendent use of SCC overall these days .In this study, the effects on the mechanical properties of the Self-compacting concrete (SCC) with partial replacement of cement by grinded fiber were studied, a mixture of equal proportion of grinded glass and basalt fiber of length 6mm was used. The volume fraction of the grinded glass and basalt mixture taken are 0%, 0.15%, 0.30%, 0.45% and 0.60% by weight of cement. In order to better understand the effect of the grinded fibers on the mechanical properties of SCC, cubes and cylinders were casted and tested for compressive strength, split tensile strength and flexural strength. For each test, data was collected and then compared with target (0%) fiber specimen. The study showed remarkable improvements in all properties of self-compacting concrete such as a compressive strength as well as enhanced durability.

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