Water-permeability measurement of high performance concrete using a high-pressure triaxial cell

1995 ◽  
Vol 25 (6) ◽  
pp. 1199-1208 ◽  
Author(s):  
A.S. El-Dieb ◽  
R.D. Hooton
Keyword(s):  
High Pressure ◽  
Water Permeability ◽  
High Performance ◽  
High Performance Concrete ◽  
Permeability Measurement ◽  
Triaxial Cell

Effect of Nano Materials on Durability of High Performance Concrete

2013 ◽  
Vol 742 ◽  
pp. 220-223 ◽  
Author(s):  
Yu Xi An
Keyword(s):  
Water Permeability ◽  
High Performance ◽  
High Performance Concrete ◽  
Shrinkage Strain ◽  
Nano Materials ◽  
Carbonation Depth ◽  
Shrinkage Cracking ◽  
Carbonation Resistance ◽  
Dry Shrinkage

The aim of this study was to study the effect of nanoSiO2 on durability of high performance concrete. Four different nanoSiO2 contents (1%, 2%, 3% and 4%) were used. The results indicate that the content of nanoSiO2 has great effect on the durability of high performance concrete. With the increase of nanoSiO2 content, both of the length of water permeability and the carbonation depth of concrete are decreasing gradually, and the water impermeability and the carbonation resistance of concrete are increasing gradually. However, with the increase of nanoSiO2 content, there is a tendency of increase on the dry shrinkage strain of 90 days of high performance concrete, and the anti-dry-shrinkage cracking property of concrete is decreasing.

Preparation of C80~C100 High Performance Concrete and the Ultrahigh Pumping Technology

2014 ◽  
Vol 919-921 ◽  
pp. 1830-1835
Author(s):  
Li Bin Xu ◽  
Nai Qian Feng ◽  
Ideris Zakaria ◽  
Bin Xing Wu
Keyword(s):  
High Pressure ◽  
High Strength Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Concrete Mixture ◽  
Viscous Resistance ◽  
The West ◽  
Strength Concrete

The high strength and high performance concrete C80~C100 is popularly used nowadays, especially in the West-Tower Project of Gungzhou. In order to provide reference for the use of high strength concrete and the development of ultrahigh pumping technology, the following six aspects were studied, namely the preparation of high strength concrete, the variation of the concrete mixture under high pressure, the index of the ultrahigh pumping concrete, the change after the pumping, the loss of the pumping pressure and the measurement of the pumping viscous resistance.

Permeability Measurement of High Performance Concrete at Elevated Temperature Employing a New Test Set-Up

2015 ◽  
Vol 1124 ◽  
pp. 288-293
Author(s):  
Michaela Fiedlerová ◽  
Johannes Kirnbauer ◽  
Heinrich Bruckner
Keyword(s):  
Elevated Temperature ◽  
High Performance ◽  
Building Materials ◽  
High Performance Concrete ◽  
Gas Permeability ◽  
Permeability Measurement ◽  
Test Set ◽  
Testing Procedures ◽  
Heating And Cooling ◽  
Set Up

This paper is focused on clarifying behaviour of concrete at elevated temperature with employing new test set-up constructed at Institute of Building Construction and Technology, Vienna University of Technology. This unique test set-up allows measuring gas permeability of different building materials such as concrete or ceramic at both high temperature (up to 400°C) and pressure (up to 6 bars). Present paper illustrates a new set up for permeability measurement during the heating and cooling and different testing procedures and evaluation of their influence on results.

scholarly journals Effectiveness of preconditioning regimes for assessing water permeability of high performance concrete

2018 ◽  
Vol 94 ◽  
pp. 126-135 ◽  
Author(s):  
Yaocheng Wang ◽  
Kai Yang ◽  
Adrian Long ◽  
Yun Bai ◽  
Sreejith Nanukuttan ◽  
...  
Keyword(s):  
Water Permeability ◽  
High Performance ◽  
High Performance Concrete

scholarly journals The influence of superplasticizer and shrinkage reducing admixture type on air-content and related properties of HPSCC

2020 ◽  
Vol 322 ◽  
pp. 01040
Author(s):  
Beata Łaźniewska-Piekarczyk
Keyword(s):  
Compressive Strength ◽  
Water Permeability ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
High Porosity ◽  
Test Results ◽  
Air Content ◽  
Shrinkage Reducing Admixture ◽  
Aerated Concrete

Theoretically, high-performance concrete with w/c ratio about 0.30 and w/b about 0.28 should have low porosity, low water permeability and high strength. The purpose of this study was to examine the influence of the superplasticizers( with and without air-entraining effect) and shrinkage reducing admixture based on a high molecular weight basis alcohol amount on the air-content, compressive strength, shrink and resistance to water penetration of high-performance self-compacting concrete (HPSCC). The test results have shown that despite the low water content, concrete modified with inadequately selected SP and high amount of SRA has a high porosity and low strength and water permeability. The types of superplasticizers and amount of SRA are significant due to porosity parameters, compressive strength and water-permeability of HPSCC. The water permeability and compressive strength of HPSCC depending on the effects of amount of SRA admixtures on the volume of pores in HPSCC. Moreover, shrinkage of incidental air-entrained concrete, despite its lower endurance, after 28 days of hardening it is smaller than non-aerated concrete.

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