scholarly journals Production of more durable and sustainable concretes using volcanic scoria as cement replacement

2017 ◽  
Vol 67 (326) ◽  
pp. 118 ◽  
Author(s):  
A. M. Al-Swaidani
Keyword(s):  
Tensile Strength ◽  
Water Permeability ◽  
Cement Mortar ◽  
Plain Concrete ◽  
Strength Development ◽  
Blended Cements ◽  
Edx Analysis ◽  
Cement Replacement ◽  
Estimation Equations ◽  
Strength And Durability

The objective of the study is to investigate strength and durability-related properties of volcanic scoria-based cements. Compressive and tensile strength development of mortars and concretes containing volcanic scoria with replacement levels ranging from 10 to 35% was investigated. Water permeability, chloride penetrability and porosity of concretes cured for 2, 7, 28, 90 and 180 days were also examined. Results revealed that volcanic scoria could be suitable for making blended cements. The strength of mortar/concrete containing volcanic scoria was lower than that of plain cement mortar/concrete at all ages. However, at 90 day curing, the strengths of volcanic scoria-based mortars/concretes were comparable to those of plain cement. In addition, water permeability, chloride penetrability and porosity of scoria-based concretes were much lower than those of plain concrete. Further, the results were statistically analysed and estimation equations have been developed to predict the studied properties. SEM/EDX analysis was employed, as well.

scholarly journals Strength Properties of Concrete with M-Sand as Fine Aggregate Incorporating with Acrylic Fiber

2020 ◽  
Vol 9 (4) ◽  
pp. 204-208
Keyword(s):  
Tensile Strength ◽  
Plain Concrete ◽  
Strength Properties ◽  
Fine Aggregate ◽  
River Sand ◽  
Split Tensile Strength ◽  
Acrylic Fiber ◽  
River Bed ◽  
Strength And Durability ◽  
Aggregate Material

The river sand is the natural sort of fine aggregate material which is employed within the concrete and mortar. It’s usually obtained from the river bed and mining has disastrous environment consequences. Rather than the river sand we are using M-sand as fine aggregate within the concrete. The event of acrylic concrete marks a crucial milestone in improving the merchandise quality and efficiency of the concrete. Usage of acrylic within the concrete will increase the strength and durability of the concrete. It enhances the performance of the concrete and increase energy absorption compared with plain concrete. Within the present work we are getting to analysis the strength properties of fiber reinforced M-sand concrete like compressive strength, flexural strength, split tensile strength, and bond strength.

Evaluation of Tensile Strength and Durability of Microbial Cement Mortar

2019 ◽  
pp. 80-89
Author(s):  
Ahmed S. D. AL-Ridha ◽  
Ali F. Atshan ◽  
Hussein H. Hussein ◽  
Ali A. Abbood ◽  
Layth Sahib Dheyab ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cement Mortar ◽  
Strength And Durability

Properties of natural pozzolan and its potential utilization in environmental friendly concrete

2011 ◽  
Vol 38 (1) ◽  
pp. 71-78 ◽  
Author(s):  
M.I. Khan ◽  
A.M. Alhozaimy
Keyword(s):  
Physical Properties ◽  
Plain Concrete ◽  
Environmental Benefits ◽  
Strength Development ◽  
Natural Pozzolan ◽  
Chloride Permeability ◽  
Cement Replacement ◽  
Pozzolanic Material ◽  
Environmental Friendly ◽  
Partial Cement Replacement

In Saudi Arabia, locally available natural pozzolanic material has the potential for use in environmental friendly concrete as a partial cement replacement. Local natural pozzolan was incorporated in concrete as a partial cement replacement to study the effect of replacement level, natural pozzolan fineness and its source. Chemical and physical properties of local natural pozzolan, properties of fresh concrete, compressive strength development, chloride permeability, and porosity of concrete incorporating local natural pozzolanic material as a partial cement replacement is presented. The influence of curing on the properties of concrete containing natural pozzolan and the X-ray diffraction analysis are reported. It was observed that regardless of its different sources, chemical and physical properties of local natural pozzolan are similar and conforms to the requirements of ASTM C 618, Class N. Concrete containing up to 15% natural pozzolan matches with the mix containing 20% fly ash, which is very close to the plain concrete. Higher dosages of this natural pozzolan can be utilized for economical and environmental benefits. This research is the first of its kind that addresses the investigation on Saudi natural pozzolanic material.

scholarly journals Strength Behavior of Mortar Using Slag As Partial Replacement of Cement

1970 ◽  
Vol 3 ◽  
Author(s):  
Md Moinul Islam ◽  
Md Saiful Islam ◽  
Md Aftabur Rahman ◽  
Amrita Das
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Cement Mortar ◽  
Partial Replacement ◽  
Strength Development ◽  
Test Results ◽  
Granulated Blast Furnace Slag ◽  
Strength Behavior ◽  
Furnace Slag ◽  
Curing Age

This paper presents an experimental investigation carried out to study the effects of Ground Granulated Blast Furnace Slag (GGBFS) on strength development of mortar and the optimum use of slag in mortar. Cement was partially replaced with seven percentages (10%, 20%, 30%, 40%, 50%, 60% and 70%) of slag by weight. Ordinary Portland cement (OPC) mortar was also prepared as reference mortar. A total of 400 cube and briquet mortar specimens were cast and compressive as well as tensile strength of the mortar specimens were determined at curing age of 3, 7, 14, 28, 60, 90 and 180 days. Test results show that strength increases with the increase of slag up to an optimum value, beyond which, strength values start decreasing with further addition of slag. Among the seven slag mortars, the optimum amount of cement replacement is about 40%, which provides 19% higher compressive strength and 25% higher tensile strength as compared to OPC mortar. KEY WORDS: Slag; Cement; Mortar; Compressive Strength; Tensile Strength; Hydration. DOI: http://dx.doi.org/10.3329/mist.v3i0.8053

scholarly journals Using SF and CKD as cement replacement materials for producing cement mortar

2021 ◽  
Vol 1058 (1) ◽  
pp. 012007
Author(s):  
M Abdulredha ◽  
Adnan A. Muhsin ◽  
Abduljaleel Al-Janabi ◽  
Bader N. Alajmi ◽  
M. Gkantou ◽  
...  
Keyword(s):  
Cement Mortar ◽  
Cement Replacement

The Effect on Cement Mortar and Concrete by Admixture of Spray Drying Absorption Products

1989 ◽  
Vol 178 ◽  
Author(s):  
Kirsten G. Jeppesen
Keyword(s):  
Grain Size ◽  
Fly Ash ◽  
Cement Mortar ◽  
Setting Time ◽  
Mineralogical Composition ◽  
Cement Clinker ◽  
Strength Development ◽  
Fall Meeting ◽  
Freeze Thaw ◽  
Spray Dried

AbstractSpray dried absorption products (SDA) having special characteristics are used as substitutes for cement in the preparation of mortars; the qualities of the resulting mixed mortars are described. Conditions are described for mortar mixes, data for which were presented at the MRS Fall Meeting 1987.The influence of the composition of the SDA on water requirement and setting time has been studied. A full scale project involving 3 precast, reinforced concrete front-elements containing 20 and 30 wt.% SDA is described. Strength development, mineralogical composition and corrosion were monitored for two years.A non-standard freeze-thaw experiment was performed which compares mortars containing SDA and fly ash (FA) and also shows the effect of superplasticizer.The possibility of improving the SDA by grinding has been tested and a limited improvement has been found. The strength of the mixed mortars seems slightly influenced by the grain size of SDAGypsum (CaSO4·2H2O), synthetic calcium-sulphite (CaSO3·½H2O) and 2 SDAs have been used as retarders for cement clinker. Mortar test prisms have been cast and comparative strengths after curing for 3 years are reported

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