Experimental Study on Anti-Frozen Durability of Concrete in Saline Soil Region

2011 ◽  
Vol 368-373 ◽  
pp. 1555-1560
Author(s):  
Wei Feng Jin ◽  
Yi Hong Wang ◽  
Gang Zhou ◽  
Kun Fan
Keyword(s):  
Experimental Study ◽  
High Performance ◽  
High Performance Concrete ◽  
Saline Soil ◽  
Single Factor ◽  
Qinghai Province ◽  
Chemical Attack ◽  
Salt Corrosion ◽  
Made In ◽  
Durability Of Concrete

Aiming at the problem of salt corrosion of concrete used in bridge and foundation in the salted areas of Qinghai province in our country,we study the performance of the prevention of salts corrosion and anti-freeze durability of concrete itself and concrete daubed waterproof materials outside or mixed the materials inside.The high-performance concrete made in this article used waterproof materials to prevent brine penetration and set multi-channel protection. The high-performance concrete specimens for comparison,the specimens daubed waterproof material, and rhe specimens mixed waterproof material inside are made to study the changing regularity under single factor and double factors(freeze and melt + chemical attack, carbonize + freeze and melt). The research results show the high-performance concrete made in this article has good anti-freeze durability and the protective covering of waterproof material can form multi-channel protection and effectively slow frozen corrosion of the concrete.

EXPERIMENTAL STUDY ON DURABILITY OF ROOM TEMPERATURE CURING UFC MORTAR

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Haruka Murakami ◽  
Hiromi Fujiwara ◽  
Masanori Maruoka ◽  
Takahumi Watanabe ◽  
Koji Satori
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
High Performance ◽  
Room Temperature ◽  
Bending Strength ◽  
High Performance Concrete ◽  
Drying Shrinkage ◽  
Concrete Repair ◽  
Repair Materials ◽  
Low Salt

In recent years, as structures become higher, larger, and more durable concrete whose compressive strength of the concrete is 150 N/mm 2 or more have been put to practical use. It is for this reason that it is necessary to develop strengthening materials with equal or better performance. Furthermore, the development of high-performance concrete repair materials is carried out because demand to seismic strengthening and repair increases. In this study, considering these circumstances, it was conducted an experimental study with the aim of developing a repair material using room temperature curing UFC (R-UFC). A binder composition preparation of the R-UFC has excellent fluidity under pressure. It was achieved that high-grade thixotropy, high compressive strength, and high bending strength. It can also be sprayed continuously because of its high thixtoropy. It was confirmed that the sprayed thickness was reached to 20mm by one work. Durability of this R-UFC was investigated and it was confirmed the high sulfate resistance, small drying shrinkage and low salt permeability.

scholarly journals Effect of added the polycarboxylate ether on slump retention and compressive strength of the high-performance concrete

2018 ◽  
Vol 195 ◽  
pp. 01020 ◽  
Author(s):  
Jonbi Jonbi ◽  
Resti Nur Arini ◽  
Basori Anwar ◽  
Mohamad Ali Fulazzaky
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
Civil Engineering ◽  
High Performance Concrete ◽  
Concrete Mixture ◽  
Concrete Sample ◽  
Strength Tests ◽  
Polycarboxylate Ether ◽  
Insight Into ◽  
Durability Of Concrete

It is well known that workability of high performance concrete (HPC) is dependent on slump value of concrete mixture. Moreover, slump retention is the most sensitive compared to a well-known slump value because it represents the durability of concrete mixture for its applications in the field of civil engineering. This research used the polycarboxylate ether (PCE) to increase slump value of concrete mixture and then verified the effect of PCE on the slump retention and compressive strength of different high-performance concretes. 0%, 0.5%, 1%, 2% of PCE were added into concrete mixture to yield a minimum compressive strength of f’c 50 MPa. The slump retention tests were performed at 0, 15, 30, 45, 60 and 75 minutes while the compressive strength tests were carried out at 3, 7, 14 and 28 days for every concrete sample. The result findings showed that the optimal concrete performance can be achieved by adding 2% of PCE to reach at a slump retention value of 45 minutes and a compressive strength of 53.84 MPa. Effect of PCE on the slump retention and compressive strength has been verified to contribute an insight into the application of a proper designed workability of HPC.

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