scholarly journals Experimental study on Strength Attainment of concrete containing silica fume and fly ash

2021 ◽  
Vol 1197 (1) ◽  
pp. 012003
Author(s):  
G.V.V. Raj Kishore
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
High Strength Concrete ◽  
High Strength ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Strength Concrete ◽  
Construction Techniques ◽  
Class F Fly Ash ◽  
Strength And Durability

Abstract Increased utilization of cement in recent construction techniques leads to the global gas emission and involves high cost. Many researchers investigated the incorporation of pozzolanic materials in the cement in order to reduce its notorious effects on the environment which directed this research in order to develop high strength concrete by partially replacing supplementary cementitious materials with the cement. This study represents the experimental investigation on concrete which is blended with class F fly ash and silica fume in order to obtain high strength concrete. For this purpose, silica fume is used in 6%, 9% fly ash is replaced with 30%,40% and 50% by weight of cement. The specimens were subjected to curing up to 90 days and conducted tests in order to determine the mechanical properties like compressive strength, flexural strength and durability properties like RCPT and UPV. Based on the experimental results, addition of 6% silica fume and fly ash at 30% replacement is high strength attainment as well as durability in the concrete.

scholarly journals Physical and Mechanical Properties of High-Strength Concrete Modified with Supplementary Cementitious Materials after Exposure to Elevated Temperature up to 1000 °C

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 532 ◽  
Author(s):  
Jianwei Zhou ◽  
Dong Lu ◽  
Yuxuan Yang ◽  
Yue Gong ◽  
Xudong Ma ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Physical Properties ◽  
Water Absorption ◽  
High Strength Concrete ◽  
Elevated Temperatures ◽  
High Strength ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Strength Concrete

This paper presents the experimental findings of a study on the influence of combining usage of supplementary cementitious materials (SCMs) on the performance of high-strength concrete (HSC) subjected to elevated temperatures. In this study, four types of HSC formulations were prepared: HSC made from cement and fly ash (FA), HSC made from cement and ultra-fine fly ash (UFFA), HSC made from cement and UFFA-metakaolin (MK), and HSC made from cement and FA-UFFA-MK. Mechanical and physical properties of HSC subjected to high temperatures (400, 600, 800, and 1000 °C) were studied. Furthermore, the relation between residual compressive strength and physical properties (loss mass, water absorption, and porosity) of HSC was developed. Results showed that the combined usage of SCMs had limited influence on the early-age strength of HSC, while the 28-d strength had been significantly affected. At 1000 °C, the residual compressive strength retained 18.7 MPa and 23.9 MPa for concretes containing 30% UFFA-5% MK and 10% FA-20% UFFA-5% MK, respectively. The specimen containing FA-UFFA-MK showed the best physical properties when the temperature raised above 600 °C. Combined usage of SCMs (10% FA-20% UFFA-5% MK) showed the lowest mass loss (9.2%), water absorption (10.9%) and porosity (28.6%) at 1000 °C. There was a strongly correlated relation between residual strength and physical properties of HSC exposed to elevated temperatures.

scholarly journals EXPERIMENTAL STUDY OF HIGH STRENGTH CONCRETE OF M90 GRADE USING UNPROCESSED FLY ASH AND SILICA FUME

2021 ◽  
Vol 6 (5) ◽  
Author(s):  
Ajit R. Sapkal ◽  
Alankar V. Jadhav ◽  
M.V. Nagendra
Keyword(s):  
Carbon Dioxide ◽  
Fly Ash ◽  
Silica Fume ◽  
High Strength Concrete ◽  
Construction Material ◽  
High Strength ◽  
Cementitious Materials ◽  
Mineral Admixtures ◽  
The Sustainable Development ◽  
Strength Concrete

– Concrete is the most widely used construction material in overall world due to its various advantages in the infrastructural industries. The production of cement causes atmospheric and environmental pollution by emitting carbon dioxide into the atmosphere. Pozzolonic by products from electrical industries are supplimentory cementitious materials such as GGBS, fly ash, slag, Rice Husk are utilized in recent years as cement alternative material for growing HSC with progressed workability, energy and durability with decreased permeability. High strength concrete (HSC) is made with adding mineral admixtures like silica fume, fly ash in the concrete. Using cementitious materials such as unprocessed fly ash and silica fume in the High strength concrete mix gives benefits in various ways. Also these materials reduces emission of carbon dioxide in the atmosphere. So that, It gives an environment friendly concrete for the sustainable development. Preparing high strength concrete by using these cementitious materials with super plasticizers gives required strength.

Research on Mechanical Properties of C100 High-Strength Concrete Used for Frozen Shaft

2012 ◽  
Vol 598 ◽  
pp. 388-392
Author(s):  
Hong Qiang Chu ◽  
Lin Hua Jiang ◽  
Ning Xu ◽  
Chuan Sheng Xiong
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Fly Ash ◽  
High Strength Concrete ◽  
High Strength ◽  
Cementitious Materials ◽  
Poisson's Ratio ◽  
Strength Concrete ◽  
Tensile Elastic Modulus ◽  
Early Strength

The mechanical properties of C100 high-strength concrete used for frozen shaft were studied in this research. The results demonstrate that: The cementitious materials 570kg/m3 concrete 28 strength is only 104.5MPa, which is lower than the C100 requirements; the early strength (3d) of the concrete doped with 30% admixture is less than 20% admixture concrete, but with the age increase, its strength gradually reaches close to concrete doped with 20% admixture, and eventually exceeds the concrete doped with 20% admixture.The tension-compression of high strength concrete doped with 15% fly ash and 15% slag is the smallest, while the tension-compression of the concrete doped 10% fly ash and 10% slag reaches the maximum.The Poisson's ratio of C100 concrete is between 0.20 and 0.24; the compressive elastic modulus is about 50GPa; and the tensile elastic modulus is about 110GPa.

Use of ground coarse fly ash as a replacement of condensed silica fume in producing high-strength concrete

2004 ◽  
Vol 34 (4) ◽  
pp. 549-555 ◽  
Author(s):  
Chai Jaturapitakkul ◽  
Kraiwood Kiattikomol ◽  
Vanchai Sata ◽  
Theerarach Leekeeratikul
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Condensed Silica Fume

scholarly journals Research on the effects of fly ash and silica fume on some properties of high-strength concrete for the construction building of coastal areas

2020 ◽  
Vol 61 (HTCS6) ◽  
pp. 88-95
Author(s):  
Tang Van Lam ◽  
Nguyen Trong Dung ◽  
Dang Van Phi ◽  
Vu Kim Dien ◽  
Nguyen Van Duong ◽  
...  
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
High Strength Concrete ◽  
High Strength ◽  
Steel Reinforcement ◽  
Strength Concrete ◽  
Mixing Ratios ◽  
Protection Time ◽  
High Consistency ◽  
Physical And Chemical

The sustainability of constructions depends on the resistance of concrete and steel reinforcement to physical and chemical aggressors from the environment. High – strength concrete with a high consistency, low permeability and resistance to environmental erosion, is preferred to be used in infrastructure construction, especially in coastal and islands areas. This paper aims to study on the mechanical properties of high-strength concrete using a mixture of fly ash and silica fume additive. Experimental obtained results show that high-strength concrete containing fly ash and silica fume with different mixing ratios have good performance (spread: 390 ÷ 625 mm and slump: 14 ÷ 20,5cm) and high compressive strength at 28 days (47 to 75MPa). In addition, the protection time of steel reinforcement according to NT Build 356-2009 can reach 85 days for samples containing 10% silica fume. This result shows that the high-strength concrete made from a mixture of fly ash and silica fume can be used in coastal and island infrastructure.

scholarly journals The Relationship between Cementitious Composition and Properties of Ultrahigh Strength Concrete

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Dehui Wang ◽  
Zhiwen Zhang
Keyword(s):  
Fly Ash ◽  
Calcium Hydroxide ◽  
Silica Fume ◽  
Design Method ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Strength Concrete ◽  
Ultrahigh Strength ◽  
Acceleration Period ◽  
The Relationship

It is well known that supplementary cementitious materials (SCMs) have obvious effects on the properties of concrete. In order to understand the relationship between cementitious materials and properties of ultrahigh strength concrete (UHSC), the cementitious compositions of UHSC were designed by the simple-centroid design method. The effects of cementitious compositions on the properties of UHSC were investigated. It was found that the incorporation of silica fume (SF) improved the flowability and strength of UHSC, but it decreased the time of acceleration period, calcium hydroxide (CH) content, and porosity of UHSC at a certain content. The incorporation of fly ash (FA) increased the flowability, time of acceleration period, and porosity of UHSC, but it decreased the strength and CH content of UHSC. The relationships between cement, silica fume, and fly ash and the properties of UHSC were calculated based on the simple-centroid design method.

Sign in / Sign up

Export Citation Format

Share Document