scholarly journals Strength Behaviour of Cement Mortar with Marble Powder as Partial Replacement of Cement

2019 ◽  
Vol 9 (1S3) ◽  
pp. 405-410
Keyword(s):  
Tensile Strength ◽  
Cement Mortar ◽  
Strength Properties ◽  
Partial Replacement ◽  
Test Results ◽  
Strength Determination ◽  
Marble Powder ◽  
Guide Lines ◽  
Split Tensile Test ◽  
Flexure Test

In this study, the strength properties of marble powder in cement mortar have been investigated. The strength studies include compression test, split tensile test and flexure test. To perform these tests, a cement mortar is prepared in the ratio of 1:3 as per the Indian Standard guide lines. In this mortar, the cement is replaced by marble powder by 5%, 10%, 15%, 20%, 25%, 30%, 35% and 40%. For testing the compression strength behaviour of marble powder in replacement of cement, cement mortar cube specimens of size 7.07 cm x 7.07 cm x 7.07 cm are cast for all the said replacement ratios. After 7 and 28 days of curing, the specimens are tested for compression. Similarly for testing of splitting tensile strength, cylindrical mortar specimens of size 60mm dia. and 120mm are cast and tested at 7 and 28 days. For flexural strength determination, beam specimens of size 160mm x 40mm x 40mm are cast and these specimens are tested after the required days of curing. From the test results, it has been found that the cement mortar mix with 10% marble powder gives better results in compression, split tension and in flexure results. To determine the oxide composition of marble powder, XRF test was performed.

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 Absorption and Strength Properties of Short Carbon Fiber Reinforced Mortar Composite

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 300
Author(s):  
Md. Safiuddin ◽  
George Abdel-Sayed ◽  
Nataliya Hearn
Keyword(s):  
Tensile Strength ◽  
Carbon Fiber ◽  
Water Absorption ◽  
Carbon Fibers ◽  
Strength Properties ◽  
Fiber Content ◽  
Test Results ◽  
Air Content ◽  
Entrapped Air ◽  
Short Carbon

This paper presents the water absorption and strength properties of short carbon fiber reinforced mortar (CFRM) composite. Four CFRM composites with 1%, 2%, 3%, and 4% short pitch-based carbon fibers were produced in this study. Normal Portland cement mortar (NCPM) was also prepared for use as the control mortar. The freshly mixed mortar composites were tested for workability, wet density, and entrapped air content. In addition, the hardened mortar composites were examined for compressive strength, splitting tensile strength, flexural strength, and water absorption at the ages of 7 and 28 days. The effects of different carbon fiber contents on the tested properties were observed. Test results showed that the incorporation of carbon fibers decreased the workability and wet density, but increased the entrapped air content in mortar composite. Most interestingly, the compressive strength of CFRM composite increased up to 3% carbon fiber content and then it declined significantly for 4% fiber content, depending on the workability and compaction of the mortar. In contrast, the splitting tensile strength and flexural strength of the CFRM composite increased for all fiber contents due to the greater cracking resistance and improved bond strength of the carbon fibers in the mortar. The presence of short pitch-based carbon fibers significantly strengthened the mortar by bridging the microcracks, resisting the propagation of these minute cracks, and impeding the growth of macrocracks. Furthermore, the water absorption of CFRM composite decreased up to 3% carbon fiber content and then it increased substantially for 4% fiber content, depending on the entrapped air content of the mortar. The overall test results suggest that the mortar with 3% carbon fibers is the optimum CFRM composite based on the tested properties.

scholarly journals THE EFFECT OF CERAMIC WASTE AS COARSE AGGREGATE ON STRENGTH PROPERTIES OF CONCRETE

2017 ◽  
Vol 36 (3) ◽  
pp. 691-696
Author(s):  
EE Ikponmwosa ◽  
SO Ehikhuenmen
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Coarse Aggregate ◽  
Control Sample ◽  
Strength Properties ◽  
Waste Material ◽  
Partial Replacement ◽  
Replacement Level ◽  
Ceramic Waste ◽  
Curing Age

This paper reports the findings on an experimental investigation of the effect of partial replacement of coarse aggregate with ceramic waste on strength properties of concrete. Compressive strength tests were conducted using 150x150x150mm cube specimens, while tensile strength was investigated using 150x300mm cylinder specimens. Results of tests show that workability, density, compressive and flexural strength of concrete decreased with increase in ceramic waste content. The compressive strength at 90 days curing age for the control sample was 24.67 N/mm2. Compressive strength values at 90 days curing age for  25%, 50% and 75% replacement levels were 21.78 N/mm2, 19.85 N/mm2and 17.85 N/mm2 respectively. The decrease in density and strength was due to ceramic waste being lighter and more porous than normal coarse aggregate. Tensile strength of concrete with ceramic waste decline gradually from 8.39 N/mm2 to 6.13 N/mm2 for the control and 75% replacement samples respectively. This could be attributed to the water absorption capacity and external porcelain nature of the waste material. A production cost savings of 10.7% for 1:2:4 concrete mix was noted at 75% replacement level. This study concludes that ceramic waste could be used for both structural and non-structural works and recommends that beyond 75% replacement level, ceramic waste material should not be used in concrete structures where strength is the major consideration. http://dx.doi.org/10.4314/njt.v36i3.5

scholarly journals EFFICACY OF BASALT AND GRANITE AS COARSE AGGREGATE IN CONCRETE MIXTURE

2020 ◽  
Vol 7 (9) ◽  
pp. 1-9
Author(s):  
S.E Ubi ◽  
P.O Nkra ◽  
R.B Agbor ◽  
D.E Ewa ◽  
M. Nuchal
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Specific Gravity ◽  
Coarse Aggregate ◽  
Strength Properties ◽  
Test Results ◽  
Physical Test ◽  
Coarse Aggregates ◽  
Structural Tests ◽  
Comparative Results

This present research was on the comparison of the efficacious use of basalt and granite as coarse aggregates in concrete work. In order to obtain the basis for comparison, physical and structural tests were conducted on the different materials of the concrete and the concrete samples respectively. Physical test results revealed that basalt have a specific gravity of 2.8 and 2.5, while granite have a specific gravity of 2.9 and 2.6. In density, basalt have a density of 1554.55kg/m3 while granite had a density of 1463.64kg/m3. Aggregate impact test conducted on both aggregates revealed a percentage of 11.05% for basalt and 12.63% for granite. The following structural tests were carried out: compressive strength tests, flexural and tensile strength test and the comparative results are as follows. Compressive strength for basalt 36.39N/mm2 while 37.16N/mm2 for granite. 24.81N/mm2 tensile strength for basalt while 12.57N/mm2 for granite, 31.83N/mm2 flexural strength for basalt while 27.97N/mm2 for granite. From the above results, it can be deduced that basalt has higher strength properties than granite. Therefore, more suitable for coarse aggregate in achieving higher strength with some quantity of other composition of the concrete mix when compared to granite.

Properties of VA/E/MMA Terpolymer Powder-Modified Mortars

2015 ◽  
Vol 1129 ◽  
pp. 169-176
Author(s):  
Sunhee Hong ◽  
Wan Ki Kim
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cement Mortar ◽  
Mercury Porosimetry ◽  
Chloride Ion ◽  
Test Results ◽  
Polymer Powder ◽  
Chloride Ion Penetration ◽  
Redispersible Polymer Powder

This study is to examine and clarify the quality of polymer-modified mortars using a VA/E/MMA terpolymer powder as compared with polymer-modified mortars using a VAE copolymer powder. Polymer-modified mortars using general commercial redispersible polymer powders are prepared with various polymer-cement ratios, and tested for flexural and compressive strengths, tensile strength, water absorption, chloride ion penetration, carbonation and pore size distribution by mercury porosimetry. Overall, the properties of polymer-modified mortars using a VA/E/MMA terpolymer powder were superior to those of polymer-modified mortars using a VAE copolymer powder. And VA/E/MMA terpolymer powder-modified mortars showed significantly improved mechanical properties and durability in comparison with unmodified mortar. It is concluded from the test results that the modification of cement mortar with redispersible polymer powder improves the properties of unmodified mortar, and VA/E/MMA terpolymer powder has higher quality than VAE copolymer powder.

scholarly journals Strength Properties of Geopolymer Concrete with Ground Granulated Blast Furnace Slag and Metakaolin

2019 ◽  
Vol 8 (4S2) ◽  
pp. 64-67
Keyword(s):  
Blast Furnace ◽  
Compression Test ◽  
Blast Furnace Slag ◽  
Strength Properties ◽  
Geopolymer Concrete ◽  
Test Results ◽  
Granulated Blast Furnace Slag ◽  
Concrete Cylinders ◽  
Furnace Slag ◽  
Flexure Test

In this study, geopolymer concrete is prepared by using 100% Ground Granulated Blast furnace Slag (GGBS). Then the GGBS is replaced by Metakaolin from 0 to 25% with the variation of 5% for preparing the specimens. The activator solution consists of Sodium hydroxide of 12 Molarity and sodium silicate in the ratio of 1: 2.5. 550kg/m3 of GGBS is used in this study. A carboxylic based admixture called La Hypercrete S25 is added in the mix by 1% of the weight of GGBS to increase the workability. The studies conducted on the specimens are compression test, split tensile test and flexure test. For conducting the compression test, 54 concrete cubes of size 100mm x 100mm x 100mm are cast for testing at 7, 14 and 28 days. For splitting tensile strength, 54 concrete cylinders with 100 mm dia and 200 mm height are cast for testing at 7, 14 and 28 days. The flexure test specimens are beams of 500 mm length and 100mm x 100mm in cross section are cast. These are 54 in numbers .Specimens are cast by replacing the GGBS by Metakaolin in 5, 10, 15, 20 and 25%. All the specimens are cured for 7, 14 and 28 days and tested for compression, split tensile and flexure. The test results reveal that the strengths are gradually increasing for 5, 10 and 15% replacement of GGBS by Metakaolin and give the highest value for 20% in all the tests. It also shows further increased replacements reduces the test values. It proves that geopolymer concrete performs well in strength properties with GGBS and Metakaolin.

scholarly journals STUDY AND ANALYSIS OF EFFECT OF STRENGTH PROPERTIES IN CALCINED KAOLIN AND SILICA FUME

2020 ◽  
Vol 8 (6) ◽  
pp. 263-269
Author(s):  
Jigyasa Shukla ◽  
Harsh Gupta
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Silica Fume ◽  
Strength Properties ◽  
Test Results ◽  
Split Tensile Strength ◽  
Strength Performance ◽  
Calcined Kaolin

This paper present the study of various strength such as compressive strength, split tensile strength and flexural strength during 7 and 28 day. It is construct the specimens size 15cm X 15cm X 15cm for testing purpose which depend upon the size of aggregate. Test results are indicated that strength performance of concrete well as in durability aspect are improved using of Silica fume

scholarly journals Size effect at testing strength properties of concrete

2021 ◽  
Vol 20 (4) ◽  
pp. 037-046
Author(s):  
Amanda Akram
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Size Effect ◽  
Strength Properties ◽  
Test Results ◽  
Variable Parameters ◽  
Crushed Granite ◽  
Compressive Strength Of Concrete ◽  
Tensile Splitting Strength ◽  
Water Ratio

Various strength characteristics of concrete are considered as fracture parameters. The compressive strength of concrete is of paramount importance when designing concrete structures, whereas tensile strength of concrete is the basic property when estimating cracking resistance of a structure and analysing fracture processes in concrete. When testing the compressive strength of concrete, the results are dependent on the shape and dimensions of used specimens. Some findings reported in the literature suggest that size effect exists also when testing such fracture properties of concrete as tensile strength. Unfortunately this problem is much less recognized and described compared to size effect in compressive test results. In this paper, the experimental investigation is presented on how the length of cylindrical specimens influences the tensile splitting strength of concrete obtained by means of the Brazilian method. Additional variable parameters were: type of aggregate (natural gravel and crushed granite) and cement-water ratio (C/W = 1.8 and C/W = 2.6).  In conducted laboratory experiments a higher splitting tensile strength of concrete was noted for all specimens with nominal dimensions of 150×150 mm, compared to specimens 150×300 mm in size, regardless of type of aggregate or cement-water ratio.

scholarly journals Performance and Micro Structural Analysis of Portland Slag Cement Mortar Induced with Pozzolanic Additives

2019 ◽  
Vol 8 (4) ◽  
pp. 744-750
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Structural Analysis ◽  
Water Absorption ◽  
Cement Mortar ◽  
Partial Replacement ◽  
Acid Attack ◽  
Slag Cement ◽  
Split Tensile Strength ◽  
Portland Slag Cement

Portland cement is a kind of cement used where the high strength and durability is needed. Also, this type of cement is essentially used to control the CO2 emission during the manufacturing process of the concrete. This cement is made up of slag with the activator such as alkalis in the form of sodium hydroxide or sodium silicate. However, this addition is increasing the overall cost of the production of concrete. In this research, a new attempt has been made to use the natural activators of Rice Husk Ash (RHA) and Natural Steatite Powder (NSP). This research aims to determine the effects of RHA and NSP with Portland slag cement by partial replacement with 5%, 10%, 15% and 20% of RHA and NSP. The influence of the RHA and NSP on the mechanical properties of the mortar was evaluated by measuring the compressive strength and the split tensile strength. The durability properties of the specimens were analyzed by water absorption, sorpitivity and acid attack tests. The analysis of the microstructure of the specimens was done by scanning electron microscope (SEM) and Fourier Transform Infrared Spectra analysis (FTIR). It was observed that the maximum compressive strength and split tensile strength was in 5% RHA and NSP blended mortar. The durability results showed that the 10% RHA and 10% NSP had lesser water absorption and sorpitivity values. From the results of micro structural analysis it was observed that replacing cement with 5% RHA and 5% NSP results in improvement of microstructure of cement mortar.

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