scholarly journals Pozzolanic and mechanical properties of Date Palm Seed Ash (Dpsa) concrete

2020 ◽  
Vol 39 (3) ◽  
pp. 680-686
Author(s):  
A.S.J. Smith ◽  
G. Xu ◽  
M.J. Garba ◽  
M.Y. Aliyu
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Water Absorption ◽  
Date Palm ◽  
Activity Index ◽  
Strength Test ◽  
Partial Replacement ◽  
Test Results ◽  
Setting Times ◽  
Compressive Strength Test

This paper presents the findings of a research work conducted on how to improve the mechanical properties of concrete using Date Palm Seed Ash (DPSA) as partial replacement of cement. The DPSA used was obtained by controlled burning of date palm seed in a kiln at a maximum temperature of 630oC for eight hours and air cooled afterwards. The ash obtained was sieved through 75μm sieve and its oxide composition analysed using X-ray fluorescence (XRF) procedures. DoE method of mix design was used to produce concrete ingredients for grade 30N/mm2 giving a water-cement ratio of 0.53. The effect of partial replacement of cement with DPSA on cement paste and concrete using 0, 2.5, 5, 7.5, 10, 15 and 20% DPSA was investigated through consistency and setting times tests, workability test, compressive strength test (at 7, 21, 28 and 56 days curing duration), pozzolanic activity index evaluation and water absorption test. Results show that DPSA has high silicon dioxide (45.50%), aluminum oxide (20.75%) and Iron oxide (7.25%). Findings indicate that the consistency and setting times of cement-DPSA paste increased with increase in the replacement of cement with DPSA. The workability of DPSA concrete decreased with increase in cement replacement. Compressive strength test results show that cement can be replaced with DPSA up to 10% as the compressive strength at 10% replacement is 31.5N/mm2 as against the 31N/mm2 of the normal concrete, at 56 days. The pozzolanic activity index result also show that DPSA concrete meets up the minimum requirement of 75% specified by ASTM C618-15. Also, the water absorption capacity of DPSA concrete at the highest replacement (20%) is 11% less than that at 0%. Keywords: Cement, Compressive strength, Concrete, Date palm seed ash, Partial replacement, Pozzolana

scholarly journals Mechanical Properties and Microstructural Features using Stone Dust as a Partial Replacement of Sand

2019 ◽  
Vol 8 (6) ◽  
pp. 5232-5237
Keyword(s):  
Mechanical Properties ◽  
Economic Growth ◽  
Sustainable Development ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Natural Resources ◽  
Strength Test ◽  
Partial Replacement ◽  
Test Results ◽  
Stone Dust

Today’s world is always leads to development in technology as well as the economic growth though sometime these will affect the environment badly. That’s why world environmental commission coined the termed called sustainable development where development takes place without hampering the others’ needs. Concrete industry is rapidly growing industry in India which consumes lots of natural resources during the production of concrete. Here Stone dust is used as a sustainable material in place of sand partially. M25 grade of concrete has been chosen for the experiments. Different mechanical properties of concrete like compressive strength, Split tensile, flexural strength etc. and Microstructural features like SEM, EDX have been included in this study. Compressive Strength and flexural strength test results shown the increase in the strength. Sulphate Resistance Properties have been tested by curing the cubes in the MgSO4 solution and increase in weight has been observed. Similarities are found in the SEM pictures

scholarly journals Laboratory Study of Water Absorption of Modified Mortar

2011 ◽  
Vol 2 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Borhan M.M. ◽  
Mohamed Sutan N.
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Polyvinyl Acetate ◽  
Final Analysis ◽  
Absorption Capacity ◽  
Strength Test ◽  
Water Absorption Capacity ◽  
Test Results ◽  
Compressive Strength Test ◽  
Water Absorption Test

This study investigates the effects of polymer additives namely polyvinyl acetate (PVAc) on water absorption and compressive strength of mortar. Twelve mortar mixtures were investigated for water absorption test and compressive strength test. Results showed that water absorption were inversely proportional to the percentage of PVAc addition. Final analysis showed that addition of PVAc had significant effects on water absorption. Samples with 1%, 3% and 5% addition of PVAc showed an increase of water absorption capacity in comparison to control mortar.

scholarly journals Pengaruh Penggunaan Material Daur Ulang Terhadap Sifat Mekanik Beton Non Pasir

2020 ◽  
Vol 9 (1) ◽  
pp. 11-19
Author(s):  
Tommy Iduwin ◽  
Dicki Dian Purnama ◽  
Pratiwi Septyaning Putri ◽  
Hastanto Siswo Martono
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Strength Test ◽  
Environmental Damage ◽  
Infrastructure Development ◽  
Test Results ◽  
Alternative Materials ◽  
Compressive Strength Test ◽  
Concrete Materials ◽  
Recycled Material

Infrastructure development is increasing every year making the need for concrete materials increases. Using alternative materials can reduce the scarcity of material and environmental damage caused by taking and dredging the material. This research is to find out how much influence the recycled material has on the compressive strength of no fines concrete. The variations used are recycled materials of 0%, 25%, 50%, 75% and 100%. Mechanical testing conducted is a compressive strength test to determine the compressive strength of no fines concrete at the age of 7, 14 and 28 days. The ratio of cement and aggregate used is 1: 4 with FAS 0.5. This research uses 15 x 30 cm cylindrical molds with 45 test specimens. The test results show the highest compressive strength value of non-sand concrete occurs at 0% recycled material by 10.47 Mpa and the lowest compressive strength on non-sand concrete 100% recycled material is 8.39 Mpa. The percentage of absorption of no fines concrete shows that the more recycled material is used, the smaller the value of water absorption. The highest absorption value in no fines concrete is 0% recycled material, which is 5.93% and the smallest value is in the variation of no fines concrete 100% recycled material recycled material that is equal to 4.99%.

scholarly journals EFFECT OF PARTIAL REPLACEMENT OF CEMENT WITH EGGSHELL ASH (ESA) ADMIXED WITH PLASTIMENT BV-40 IN CONCRETE

2020 ◽  
Vol 4 (2) ◽  
pp. 284-289
Author(s):  
Dr.Muhammad Magana Aliyu Aliyu ◽  
Nuruddeen Muhammad Musa
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Strength Test ◽  
Ash Content ◽  
Splitting Tensile Strength ◽  
Partial Replacement ◽  
Test Results ◽  
Tensile Strength Test ◽  
Compressive Strength Test ◽  
Partial Cement Replacement

The use of eggshells ash for partial cement replacement in concrete has been well established in earlier studies. The effect of such partial replacement of cement with an eggshell ash and Plastiment BV-40 was investigated in this. Tests including slump test, compressive strength test, splitting tensile strength test and concrete density test were carried out on concrete in which cement was partially replaced with 0%, 5%, 10%, 15%, 20%, and 25% eggshell ash and presented. The test results indicate that eggshell ash decreases the workability of concrete. Also, for the compressive strength at 5% content, after which there is  decrease in the compressive strength with increase in the ash content. Furthermore, eggshell ash is found to increase the concrete splitting tensile strength. It was concluded that eggshell ash has the potential of being utilized in concrete as partial replacement of cement.

scholarly journals Analysis of The Rock Fracture on Uniaxial Compressive Strength Test

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Edward Dinoy ◽  
Yohanes Gilbert Tampaty ◽  
Imelda Srilestari Mabuat ◽  
Joseph Alexon Sutiray Dwene
Keyword(s):  
Compressive Strength ◽  
Uniaxial Compressive Strength ◽  
Poisson Ratio ◽  
Rock Fracture ◽  
Strength Test ◽  
Maximum Pressure ◽  
Test Results ◽  
Average Value ◽  
Compressive Strength Test ◽  
Uniaxial Compressive Strength Test

The compressive strength test is one of the technical properties or compressive strength tests that are commonly used in rock mechanics to determine the collapse point or the elasticity of rock against maximum pressure. The rock collapse point is a measure of the strength of the rock itself when the rock is no longer able to maintain its elastic properties. The purpose of this test is to find out how long the rock maintains its strength or elasticity properties when pressure is applied, and to find out the difference between the strength of compact rock and rock that has fractures when pressure is applied. Rocks that have fractures will break more easily or quickly when pressure is applied compared to compact rocks. This analysis is carried out by comparing the rock strength of each sample, both those that have fractures and compact rocks. To find out these differences, laboratory testing was carried out. The test results show the value (compressive strength test 57.76 MPa), (elastic modulus 5250.000MPa), (Poisson ratio 0.05) and the average value of rock mechanical properties test (axial 0.91), (lateral-0.279), and (volumetric 0.252) . Based on the test results above, it shows that rocks that have fractures will break more easily when pressure is applied, compared to compact rocks that have a long time in the uniaxial compressive strength test.

scholarly journals Effect of fine recycled aggregates on the properties of non-cement blended materials

2020 ◽  
Vol 323 ◽  
pp. 01018
Author(s):  
Wei-Ting Lin ◽  
Lukáš Fiala ◽  
An Cheng ◽  
Michaela Petříková
Keyword(s):  
Compressive Strength ◽  
Blast Furnace Slag ◽  
Interface Structure ◽  
Strength Test ◽  
Recycled Aggregates ◽  
Test Results ◽  
Granulated Blast Furnace Slag ◽  
Fine Aggregates ◽  
Compressive Strength Test ◽  
Furnace Slag

In this study, the different proportions of co-fired fly ash and ground granulated blast-furnace slag were used to fully replace the cement as non-cement blended materials in a fixed water-cement ratio. The recycled fine aggregates were replaced with natural fine aggregates as 10%, 20%, 30%, 40% and 50%. The flowability, compressive strength, water absorption and scanning electron microscope observations were used as the engineered indices by adding different proportions of recycled fine aggregates. The test results indicated that the fluidity cannot be measured normally due to the increase in the proportion of recycled fine aggregates due to its higher absorbability. In the compressive strength test, the compressive strength decreased accordingly as the recycled fine aggregates increased due to the interface structure and the performance of recycled aggregates. The fine aggregates and other blended materials had poor cementation properties, resulting in a tendency for their compressive strength to decrease. However, the compressive strength can be controlled above 35 MPa of the green non-cement blended materials containing 20% recycled aggregates.

BEHAVIOR OF M 50 GRADE SELF-COMPACTING CONCRETE DEVELOPED USING PORTLAND SLAG CEMENT AND METAKAOLIN

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Sravya Nalla ◽  
Janardhana Maganti ◽  
Dinakar Pasla
Keyword(s):  
Compressive Strength ◽  
Mineral Admixtures ◽  
Partial Replacement ◽  
Test Results ◽  
Slag Cement ◽  
Self Compacting Concrete ◽  
Destructive Testing ◽  
Compressive Strength Test ◽  
Portland Slag Cement ◽  
Strength And Durability

Self-compacting concrete (SCC) is a revolutionary development in concrete construction. The addition of mineral admixtures like metakaolin, which is a highly reactive pozzolana to the SCC mixes, gives it superior strength and durability. The present work is an effort to study the behavior of M50 grade SCC by partial replacement of Portland Slag Cement (PSC) with metakaolin. Its strength and durability aspects are comparable with a controlled concrete (without replacement of cement). In the present work, a new mix design methodology based on the efficiency of metakaolin is adopted. The optimum percentage replacement of cement with metakaolin is obtained based on compressive strength test results. The influence of metakaolin on the workability, compressive strength, splitting tensile strength and flexural strength of SCC and its behavior when subjected to elevated temperature was investigated through evaluation against controlled concrete and non-destructive testing. From the test results, it was observed that incorporation of metakaolin at an optimum dosage satisfied all the fresh properties of SCC and improved both the strength and durability performance of SCC compared to controlled concrete.

Low Strength Self Compacting Concrete Compressive Strength Test

2013 ◽  
Vol 275-277 ◽  
pp. 2041-2044
Author(s):  
Feng Yan ◽  
Nan Pang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Compression Strength ◽  
Strength Test ◽  
The Self ◽  
Concrete Compressive Strength ◽  
Self Compacting Concrete ◽  
Intensity Index ◽  
Compressive Strength Test ◽  
Low Strength

In this paper,the mechanical properties were studied,the self compacting concrete cubic compression strength,prismatic compressive strength test,discussed two kinds of relationship between intensity index.

Study on Properties of Blended Finely Ground Limestone Powder Cement and Compressive Strength of Mortar

2010 ◽  
Vol 168-170 ◽  
pp. 1449-1454
Author(s):  
Heng Lin Lv ◽  
Fu Ping Jia ◽  
Yong Cheng ◽  
Yong Li ◽  
Yu Long ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Influence Factor ◽  
Activity Index ◽  
Limestone Powder ◽  
Hardened Cement ◽  
Test Results ◽  
Replacement Level ◽  
Setting Times ◽  
Four Levels ◽  
Ground Limestone

The effect of replacement of Portland cement by ground limestone as well as its specific surface Blaine (SSB) on the physical-mechanical properties of fresh and hardened cement paste is studied. The binder was composed of cement and limestone, which was prepared by eight replacement levels of limestone powder (0,5,10,15,20,25,30 and 35%) of binder by mass and four levels of SSB (300,600,800 and 1000 m2/kg). Test results demonstrated that the water requirement of normal consistency and the setting times(initial and final) decreased obviously as the replacement level of limestone powder increased and the extent of reduction was noticeable with the increase of SSB of limestone powder. The compressive strength of mortar incorporating different replacement levels and various SSB of limestone powder increased steadily with ages. The compressive strength decreased with the increase of replacement level of limestone, while as increased with the increase of SSB at the same replacement level and ages. The SSB influence factor was created to describe the effect of SSB of limestone powder on the compressive strength. The strength activity index of limestone powder concerning the replacement levels, SSB of limestone powder and mortar ages was established. The grade of limestone powder was suggested in order to reasonable utilization.

scholarly journals THE EFFECT OF ADDING CEMENT WASTE ON THE QUALITY OF CONCRETE COMPRESSIVE

Jurnal CIVILA ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 213
Author(s):  
Asrul Majid ◽  
Hammam Rofiqi Agustapraja
Keyword(s):  
Compressive Strength ◽  
Strength Test ◽  
Fine Aggregate ◽  
Infrastructure Development ◽  
Test Results ◽  
Compressive Strength Test ◽  
Compressive Strength Of Concrete ◽  
Concrete Materials ◽  
Test Objects

Infrastructure development is one of the important aspects of the progress of a country where most of the constituents of infrastructure are concrete. The most important constituent of concrete is cement because its function is to bind other concrete materials so that it can form a hard mass. The large number of developments using cement as a building material will leave quite a lot of cement bags.In this study, the authors conducted research on the effect of adding cement waste to the compressive strength of concrete. This study used an experimental method with a total of 24 test objects. The test object is in the form of a concrete cylinder with a diameter of 15 cm and a height of 30 cm and uses variations in the composition of the addition of cement waste cement as a substitute for fine aggregate, namely 0%, 2%, 4% and 6%. K200). The compressive strength test was carried out at the age of 7 days and 28 days.The test results show that the use of waste as a partial substitute for fine aggregate results in a decrease in the compressive strength of each mixture. at the age of 7 days the variation of 2% is 16.84 MPa, 4% is 11.32 MPa and for a mixture of 6% is 6.68 MPa. Meanwhile, the compressive strength test value of 28 days old concrete in each mixture decreased by ± 6 MPa. So the conclusion is cement cement waste cannot be used as a substitute for fine aggregate in fc 16.6 (K200) quality concrete because the value is lower than the specified minimum of 16.6 MPa.

Sign in / Sign up

Export Citation Format

Share Document