Effect of Silica Fume on Dry Shrinkage and Freezing-Thawing Durability of Concrete

2012 ◽  
Vol 238 ◽  
pp. 165-168 ◽  
Author(s):  
Feng Li ◽  
Zai Peng Cui
Keyword(s):  
Adverse Effect ◽  
Experimental Study ◽  
Silica Fume ◽  
Considerable Increase ◽  
Shrinkage Strain ◽  
Dry Shrinkage ◽  
Shrinkage Property ◽  
Durability Of Concrete

An experimental study has been conducted to investigate the effect of silica fume on shrinkage and freezing-thawing durability of concrete, a large number of tests have been carried out in this study. The results indicate that the addition of silica fume has adverse effect on the dry shrinkage property of concrete. The dry shrinkage strain of the concrete containing silica fume is more than that of the concrete without silica fume, and a considerable increase for the dry shrinkage strain of the concrete was observed by increasing the dosage of silica fume. However, the addition of silica fume can improve the freezing-thawing durability of the concrete evidently, and the freezing-thawing durability is becoming better and better as the silica fume content is increasing gradually.

Effect of silica fume on durability of concrete composites containing fly ash

2013 ◽  
Vol 20 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Peng Zhang ◽  
Qing-fu Li
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
Shrinkage Strain ◽  
Carbonation Depth ◽  
Freeze Thaw ◽  
Slump Flow ◽  
Carbonation Resistance ◽  
Dry Shrinkage ◽  
Shrinkage Property ◽  
Durability Of Concrete

AbstractIn this paper, the effect of silica fume on the workability and durability of concrete composites containing fly ash, including water impermeability, dry shrinkage property, carbonation resistance and freeze-thaw resistance, are presented. Four different silica fume contents (3%, 6%, 9% and 12%) were used. The results indicate that the addition of silica fume has greatly improved the durability of water impermeability, the carbonation resistance and the freeze-thaw resistance of the concrete composites containing fly ash. With the increase in silica fume content, the length of water permeability and the carbonation depth of the specimens decrease gradually, and the relative dynamic elastic modulus of the specimens has a tendency to increase. However, the addition of silica fume has a little adverse effect on the workability and dry shrinkage property of concrete composites containing fly ash. With the increase in silica fume content, both the slump and the slump flow decrease gradually, and the dry shrinkage strain increases gradually.

Effect of Silica Fume on Workability and Water Impermeability of Concrete

2012 ◽  
Vol 238 ◽  
pp. 157-160 ◽  
Author(s):  
Fu Hua Wang ◽  
Sen Li
Keyword(s):  
Adverse Effect ◽  
Experimental Study ◽  
Silica Fume ◽  
Considerable Decrease

A designed experimental study has been conducted to investigate the effect of silica fume on workability and water impermeability of concrete, a large number of experiments have been carried out in this study. The results indicate that the addition of silica fume has adverse effect on the workability of concrete composite. The slump and flowability of the concretes containing silica fume is less than that of the concrete without silica fume, and a considerable decrease for the slump and flow of the concrete was observed by increasing the dosage of silica fume. Besides, the addition of silica fume can improve the water impermeability of the concrete composite evidently, and the water impermeability is becoming better and better as the silica fume content is increasing gradually.

Effect of Silica Fume on Mechanical Properties and Carbonation Resistance of Concrete

2012 ◽  
Vol 238 ◽  
pp. 161-164 ◽  
Author(s):  
Qing Long Wang ◽  
Jun Chao Bao
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Elastic Modulus ◽  
Silica Fume ◽  
Compression Strength ◽  
Considerable Increase ◽  
Carbonation Resistance

A designed experimental study has been conducted to investigate the effect of silica fume on mechanical properties and carbonation resistance of concrete, a large number of experiments have been carried out in this study. The results indicate that the addition of silica fume has improved the compression strength and elastic modulus of concrete. A considerable increase for the compression strength and elastic modulus of the concrete was observed by increasing the dosage of silica fume. Besides, the addition of silica fume can improve the carbonation resistance of the concrete composite evidently, and the carbonation resistance is becoming better and better as the silica fume content is increasing gradually.

EXPERIMENTAL STUDY ON GEOPOLYMER PASTE BLENDED WITH SILICA FUME

2020 ◽  
Vol 85 (769) ◽  
pp. 321-330
Author(s):  
Palamy PHOMMAHAXAY ◽  
Saya IOROI ◽  
Shigemitsu HATANAKA
Keyword(s):  
Experimental Study ◽  
Silica Fume ◽  
Geopolymer Paste

The Influence of Different Subbase Materials on the Crack of Cement Stabilized Macadam Base during Construction

2012 ◽  
Vol 591-593 ◽  
pp. 955-959 ◽  
Author(s):  
Xiao Feng Liao ◽  
Fen Xiao ◽  
Zhong Da Chen ◽  
Lei Xing
Keyword(s):  
Tensile Stress ◽  
Shrinkage Strain ◽  
Mechanical Parameters ◽  
Tensile Stresses ◽  
Shrinkage Crack ◽  
Dry Shrinkage ◽  
Base Course ◽  
Shrinkage Coefficient ◽  
Crack Space

According to actual axle load data and the measured mechanical parameters of cement stabilized macadam material with different cement dosages, the bottom tensile stresses of different subbase structures are calculated and the results show that: to graded gravel subbase, the weight of construction vehicle is inadvisable to be more than 35t and the cement dosage of base course shall be more than 3.0%; and, the maximum bottom tensile stress of graded gravel subbase shall be much more than that of lime-flyash soil subbase. According to the measured dry shrinkage strain and dry shrinkage coefficient, the dry shrinkage crack space of base course is analyzed and the results show that: under the same cement dosage, the crack space of the base course with graded gravel subbase is smaller than that of lime-flyash soil subbase; with the increase of cement dosage, the crack space of base course increase first and then decrease, and when the cement dosage is 3.5%, the dry shrinkage strain and dry shrinkage coefficient is minimum and the crack space of base course is maximum.

scholarly journals A STUDY OF THE EFFECT OF THE PHYTOCHEMICAL CONTENT OF P. AMERICANALEAF ON HEMATOLOGICAL SYSTEM OF ALBINO RATS

2021 ◽  
Vol 9 (04) ◽  
pp. 464-467
Author(s):  
Ngozi a ◽  
◽  
N. Omeke ◽  
Haruna M. Ndahi ◽  
◽  
...  
Keyword(s):  
Adverse Effect ◽  
Experimental Study ◽  
Aqueous Extract ◽  
Leaf Extract ◽  
Control Group ◽  
Albino Rats ◽  
Phytochemical Content ◽  
Other Substances ◽  
And Control ◽  
Experimental Group

Given the medicinal importance of the avocado plant in alternative medicine,the present study aimed to study the effect of the phytochemical content of P. americana leaf extract on the hematological system of albino rats. Albino rats were obtained andclustered into sixgroups,with five rats per groupsimultaneously were assigned experimental and control. The rats in the experimental group were administered with varying doses of the prepared aqueous extract of P. americanawithin the period of the study. The rats in the control group were administered with other substances such as water and feed for the study period.The hematological system of the experimental animal was assessed after the administration of the extract, and it was observed that the aqueous extract of P. americana leaf recorded no significant adverse effect on the hematology system of the experimental study animal.

scholarly journals An Experimental Study on Self Consolidating Concrete with Silica Fume and Glass Fibre

2016 ◽  
Vol V5 (12) ◽  
Author(s):  
M. Vidhya ◽  
E. Ezhilarasi ◽  
M. Nandhini Chella Kavitha ◽  
K. Rubini ◽  
Keyword(s):  
Experimental Study ◽  
Silica Fume ◽  
Glass Fibre ◽  
Self Consolidating Concrete

scholarly journals APPLICATION OF COCONUT FIBER AND POLYVINYL-ALCOHOL BLENDS TO IMPROVE THE DURABILITY OF CONCRETE STRUCTURES IN VIETNAM

InterConf ◽  
2021 ◽  
pp. 418-426
Author(s):  
Thi Ngoc Quyen Nguyen
Keyword(s):  
Polyvinyl Alcohol ◽  
Calcium Hydroxide ◽  
Silica Fume ◽  
Rice Husk ◽  
Coarse Aggregate ◽  
Rice Husk Ash ◽  
Coconut Fiber ◽  
Conventional Concrete ◽  
Cement Powder ◽  
Durability Of Concrete

The biggest disadvantage of conventional concrete is brittle and hard, in addition, its durability is not high. The low durability of concrete is due to the presence of calcium hydroxide at the intersection of coarse aggregate particles and hard cement powder. The introduction of coconut fiber and polyvinyl alcohol (PVA) fibers into the concrete to improve the durability and flexibility of the concrete. In addition, the article also considers the effects of other additives such as rice husk ash, silica fume to study the performance of the structure as well as its durability when joining concrete mixes to create flexible concrete movable and more flexible than conventional concrete.

Sign in / Sign up

Export Citation Format

Share Document