scholarly journals Fresh and Hardened Properties of Hybrid Fibre Reinforced Self Consolidating Concrete Containing Basalt and Polypropylene Fibres

2019 ◽  
Vol 8 (2) ◽  
pp. 3356-3361 ◽  
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Research Paper ◽  
Pulse Velocity ◽  
Fresh Properties ◽  
Polypropylene Fibres ◽  
Self Consolidating Concrete ◽  
Complete Filling ◽  
Hybrid Fibre ◽  
Hardened Properties

Evidences as well as outcomes proved that the progress of self-consolidating concrete is comprehensive benchmark in the construction area. Due to its highly beneficial characteristics, self-consolidating concrete is eminently preferred and widely used all around the Globe. Self-consolidating concrete is that inventive concrete which does not need any assistance of vibration by any means in order for its placement and compaction. Its ability to flow under its self-weight allows complete filling formwork. Hence, successful results to attain full compaction, even in the existence of clogged reinforcement. Intension of this research paper is to put light on the fresh properties of hybrid fibre reinforced self-consolidating concrete (HFRSCC)such as T50cm, L-box, spread flow, V-funnel and properties of hardened like compressive strength, flexural strength and ultra-sonic pulse velocity at the period of 7 and 28 days. The properties of hardened HFRSCC is greatly improved by the process of addition of fibres.

scholarly journals Fresh and Hardened Characteristics of Basalt-Glass Hybrid Fibre Reinforced Self Compacting Concrete

2019 ◽  
Vol 9 (2) ◽  
pp. 122-126
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Ultrasonic Pulse Velocity ◽  
Research Paper ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Self Compacting Concrete ◽  
Basalt Glass ◽  
Complete Filling ◽  
Hybrid Fibre

Proof that, just as results, self-compacting concrete is complete benchmark in the area of construction. Because of its highly profitable qualities, Self Compacting Concrete (SCC) extremely favoured and used drastically all over the construction world. SCC is that creative concrete which does not require any help of vibration for arrangements and compaction. It is shown that SCC have capability of complete filling formwork by property of flow under its self weight. Hence, it attain over all compaction, even in case of choke reinforcement. The main intent of this research paper is to find the fresh characteristics of basalt- glass hybrid fibre reinforced self-compacting concrete like T50 cm, spread flow, L-box, V funnel and hardened characteristics such as compressive strength, ultrasonic pulse velocity (UPV) and flexural strength at 7 and 28 days. Basalt-glass hybrid fibre reinforced self-compacting concrete has shown improved hardened characteristics with the addition of fibres.

Mechanical Properties of Engineered Cementitious Composites Mixture

2014 ◽  
Vol 567 ◽  
pp. 428-433 ◽  
Author(s):  
Bashar S. Mohammed ◽  
Muhammad Hafiz Baharun ◽  
Muhd Fadhil Nuruddin ◽  
Odu Paul Duku Erikol ◽  
Nadhir Abdulwahab Murshed
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Flexural Strength ◽  
The Self ◽  
Cementitious Composite ◽  
Fresh Properties ◽  
Self Compacting Concrete ◽  
Engineered Cementitious Composite ◽  
Hardened Properties ◽  
Pva Fiber

The aim of the research is to develop engineered cementitious composite mixtures satisfying the self-compacting concrete requirements and to evaluate the hardened properties of self-compacted ECC mixtures. To enhance the concrete performance, PVA is used. The PVA improved some characteristics and properties of the concrete. Ten mixes with different Polyvinyl Alcohol (PVA) fiber contents (0.0%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5% and 5.0%) have been prepared. Three cubes (100mm x 100mm x 100mm), three beams (100mm x 100mm x 500mm) and three cylinders (150mm diameter and 300mm height) have been cast for each mix and tested at the age of 7 and 28 days for compressive strength and at age of 28 days for splitting and flexural strength. The V-funnel, L-box and slump test also have been conducted to access the fresh properties like workability and flowability of the concrete. The results indicated the increase in the strength of the concrete and the formulas for predicting the compressive, splitting and flexural strength from PVA (%) has been developed.

scholarly journals Effect of Biopolymer Alginate on some properties of concrete

2020 ◽  
Vol 26 (6) ◽  
pp. 121-131 ◽  
Author(s):  
Hawraa Mohammed Mohesson ◽  
Waleed A. Abbas
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Natural Polymer ◽  
Fresh Properties ◽  
Brown Seaweeds ◽  
Mix Proportion ◽  
Hardened State ◽  
Hardened Properties ◽  
Positive Effect

Alginate from Large brown seaweeds act as natural polymer has been investigated as polymer and has been added to concrete in different percentages ( 0% , 0.5% , 1% and 1.5% ) by the cement weight and the study show the effect of using alginate biopolymer admixtures on  some of the fresh properties of the concrete (slump &  the density  fresh) also in the hardened state (  Compressive strength , Splitting tensile strength  and Flexural strength ) at 28 days. The mix proportion was (1:2.26:2.26) (cement: sand: gravel) respectively and at constant w/c equal to 0.47. The results indicate that the use of alginate as a percent of the cement weight possess a positive effect on fresh properties of concrete at 28 days. In other words, increasing the percentages of alginate addition has enhanced the slump and fresh density of concrete at 28 days, so the 1.5% alginate addition as percent of the  cement weight showed the higher percentage of increasing where it was 2.5% for fresh density and 41%for slump of concrete at 28days compared with the reference mix without any addition, also the hardened properties (compression ,splitting tensile and flexural strength) at 28 days showed an increasing when using alginate  at a percentage from the cement weight, so the    highest increase was at 0.5% and 1.5% of alginate addition where it was about 40%.

Fresh, Durability and Mechanical Behavior of Self Consolidating Concrete Incorporating Fly Ash and Admixture under Hot Weather

2021 ◽  
Vol 904 ◽  
pp. 453-457
Author(s):  
Samer Al Martini ◽  
Reem Sabouni ◽  
Abdel Rahman Magdy El-Sheikh
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Water Absorption ◽  
Weather Conditions ◽  
Chloride Penetration ◽  
The Self ◽  
Fresh Properties ◽  
Self Consolidating Concrete ◽  
Slump Flow ◽  
Hot Weather

The self-consolidating concrete (SCC) become the material of choice by concrete industry due to its superior properties. However, these properties need to be verified under hot weather conditions. The paper investigates the behavior of SCC under hot weather. Six SCC mixtures were prepared under high temperatures. The SCC mixtures incorporated polycarboxylate admixture at different dosages and prolonged mixed for up to 2 hours at 30 °C and 40 °C. The cement paste was replaced with 20% of fly ash (FA). The fresh properties were investigated using slump flow, T50, and VSI tests. The compressive strength was measured at 3, 7, and 28 days. The durability of SCC mixtures was evaluated by conducting rapid chloride penetration and water absorption tests.

Influence of Fly Ash and Basalt Fibers on Strength and Chloride Penetration Resistance of Self-Consolidating Concrete

2016 ◽  
Vol 866 ◽  
pp. 3-8 ◽  
Author(s):  
Osama Ahmed Mohamed ◽  
Waddah Al Hawat
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Portland Cement ◽  
Strength Properties ◽  
Chloride Penetration ◽  
Partial Replacement ◽  
Basalt Fibers ◽  
Self Consolidating Concrete ◽  
Chloride Penetration Resistance ◽  
Hardened Properties

Fly ash is a sustainable partial replacement of Portland cement that offers significant advantages in terms of fresh and hardened properties of concrete. This paper presents the findings of a study that aims at assessing the durability and strength properties of sustainable self-consolidating concrete (SCC) mixes in which Portland cement was partially replaced with 10%, 20%, 30%, and 40% fly ash. The study confirms that replacing Portland cement with fly ash at all of the percentages studied improves resistance of concrete to chloride penetration. The 40% fly ash mix exhibited the highest resistance to chloride penetration compared to the control mix. Despite the relative drop in compressive strength after 7 days of curing, the 28-day compressive strength of 40% SCC mix reached 55.75 MP, which is very close to the control mix. The study also confirms that adding 1%, 1.5%, and 2% basalt fibers, respectively, to the 40% fly ash mix improves the resistance to chloride penetration compared to the mix without basalt fibers.

scholarly journals Production of lightweight Geopolymer concrete using artificial local lightweight aggregate

2018 ◽  
Vol 162 ◽  
pp. 02024
Author(s):  
Waleed Abbas ◽  
Wasan Khalil ◽  
Ibtesam Nasser
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Lightweight Concrete ◽  
Lightweight Aggregate ◽  
Experimental Tests ◽  
Pulse Velocity ◽  
Dry Density ◽  
Geopolymer Concrete

Due to the rapid depletion of natural resources, the use of waste materials and by-products from different industries of building construction has been gaining increased attention. Geopolymer concrete based on Pozzolana is a new material that does not need the presence of Portland cement as a binder. The main focus of this research is to produce lightweight geopolymer concrete (LWGPC) using artificial coarse lightweight aggregate which produced from locally available bentonite clays. In this investigation, the binder is low calcium fly ash (FA) and the alkali activator is sodium hydroxide and sodium silicate in different molarities. The experimental tests including workability, fresh density, also, the compressive strength, splitting tensile strength, flexural strength, water absorption and ultrasonic pulse velocity at the age of 7, 28 and 56 days were studied. The oven dry density and thermal conductivity at 28 days age are investigated. The results show that it is possible to produce high strength lightweight geopolymer concrete successfully used as insulated structural lightweight concrete. The 28-day compressive strength, tensile strength, flexural strength, dry density, and thermal conductivity of the produced LWGPC are 35.8 MPa, 2.6MPa, 5.5 MPa, 1835kg/m3, and 0.9567 W/ (m. K), respectively.

Properties of Unfired Building Bricks Prepared from Fly Ash and Residual Rice Husk Ash

2015 ◽  
Vol 754-755 ◽  
pp. 468-472 ◽  
Author(s):  
Chao Lung Hwang ◽  
Trong Phuoc Huynh
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Flexural Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Fine Aggregate ◽  
Test Results ◽  
Design Algorithm ◽  
Potential Applications ◽  
Hardened Properties

This work investigates the possibility of using fly ash (FA) and Vietnam residual rice husk ash (RHA) in producing unfired building bricks with applying densified mixture design algorithm (DMDA) method. In this research, little amount of cement was added into the mixtures as binder substitution. Unground rice husk ash (URHA), an agricultural by-product, was used as partial fine aggregate replacement (10% and 30%) in the mixtures. The solid bricks of 220×105×60 mm in size were prepared in this study. The hardened properties of the bricks were investigated including compressive strength, flexural strength and water absorption according to corresponding Vietnamese standards. Forming pressure of 35 MPa was applied to form the solid bricks in the mold. The test results show that all brick specimens obtained good mechanical properties, which were well conformed to Vietnamese standard. Compressive strength and flexural strength of the bricks were respectively in range of 13.81–22.06 MPa and 2.25–3.47 MPa. It was definitely proved many potential applications of FA and RHA in the production of unfired building bricks.

scholarly journals Non Destructive Studies on Engineered Cementitious Composites using Microsilica & Polypropylene Fibre

2019 ◽  
Vol 8 (2S5) ◽  
pp. 18-21
Keyword(s):  
Compressive Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Mineral Admixture ◽  
Cementitious Composites ◽  
Engineered Cementitious Composites ◽  
Polypropylene Fibres ◽  
Curing Regimes ◽  
Non Destructive

This study focuses on assessing the durability property of engineered cementitious composites using Ultrasonic pulse velocity method (direct and semi direct) to compute the compressive strength. Even the effect of mineral admixture on the mortar properties for different curing regimes shall be determined using this method. Mortar specimens containing microsilica in different percentages ranging from 5% to 25%, replacing portland cement by weight and adding polypropylene fibres ranging from 0.5% to 2% are chosen for evaluation. 20% of microsilica and 2% of polypropylene fibres induced to increase the range of UPV from 3463 m/s to 3505 m/s for 7 and 28 day curing regimes and also the compressive strength significantly improved for the above constituent. However there was a marginal decrease in the compressive strength and UPV outcomes when cement is replaced by microsilica greater than 20%. A relationship had been framed between ultrasound pulse velocity and compressive strength.

scholarly journals Properties of foamed concrete reinforced with hybrid fibres

2018 ◽  
Vol 162 ◽  
pp. 02012 ◽  
Author(s):  
Waleed Abbas ◽  
Eethar Dawood ◽  
Yahya Mohammad
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Splitting Tensile Strength ◽  
The Other ◽  
Carbon Fibres ◽  
Volumetric Fraction ◽  
Polypropylene Fibres ◽  
Concrete Mix ◽  
Foamed Concrete ◽  
Hardened Properties

The properties of foamed concrete reinforced with carbon fibres and hybrid fibres of carbon with polypropylene fibres has been studied. Various volumetric fractions of carbon fibres (0.5, 1 and 1.5%), hybrid fibres of carbon fibres (CF) with polypropylene fibres (PPF) as (1% CF + 0.5% PPF) & (0.5% CF + 1% PPF), also the mono polypropylene fibres as 1.5% PPF were used to reinforce foamed concrete mix. Fresh and hardened properties of all mixes included flowability, density, absorption, compressive strength, splitting tensile strength, and flexural strengths has been tested. Results showed that inclusion of carbon fibres up to 1% volumetric fraction may increase the compressive strength by about 36% higher than that of control mix. Whereas, the use of 1.5% carbon fibres exhibit significant increase in splitting and flexural tensile strengths by about 47 and 114%, respectively, compared to the reference mix. On the other hand, the hybridization of 1% CF + 0.5% PPF increased the splitting tensile strength and flexural strengths by 53% and 114%, respectively, compared with plain foamed concrete mix.

scholarly journals Effect of Water-Cement Ratio on the Properties of NaOH-Treated Rubberized Mortar

2020 ◽  
Vol 862 ◽  
pp. 135-139
Author(s):  
Dhabit Zahin Alias Tudin ◽  
Ahmad Nurfaidhi Rizalman
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Crumb Rubber ◽  
Fine Aggregate ◽  
Volume Percentage ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Effect Of Water ◽  
Hardened Properties ◽  
Rubberized Mortar

In this study, crumb rubber was used to partially replaced fine aggregate in mortar mixture by 5, 10, 15 and 20 volume percentage (vol%) with untreated and NaOH-treated crumb rubber. There were three (3) different water-cement ratio used which are 0.45, 0.50 and 0.55. Thus, the total number of mixtures was 27. The mortars were tested for flowability, compressive strength, flexural strength and density. Based on the results, higher water cement ratio and percentage of crumb rubber replacement increased the flowability but lowered the density, compressive strength and flexural strength of the rubberized mortar. It was also discovered that the significant effect of water-cement ratio on the fresh and hardened properties of the rubberized mortar was due to the water content in the mixture. Meanwhile, the use of NaOH as treatment to crumb rubber improved the flowability, compressive strength and flexural strength of the rubberized mortar.

Sign in / Sign up

Export Citation Format

Share Document