The Relationship between Concrete Road Performance and Salt Frost

2013 ◽  
Vol 857 ◽  
pp. 271-276
Author(s):  
Sheng Bo Zhou ◽  
Ai Qin Shen
Keyword(s):  
Abrasion Resistance ◽  
Chloride Ion ◽  
Ion Permeability ◽  
Mixture Ratio ◽  
Tensile Strength Test ◽  
Flexural Tensile Strength ◽  
Chloride Ion Penetration ◽  
Road Performance ◽  
Chlorine Ion ◽  
The Relationship

To carry out frost resistance, resistance to chlorine ion permeability, abrasion resistance and flexural tensile strength test for different mixture ratio of concrete, the influence of salt frost was systematically analyzed on the other concrete road performance. The results show that the salt frost made the decrease of strength of concrete, resistance to chloride ion penetration reduce, but had a little effects on abrasion resistance.

Research on the Durability of Reinforced Chemically Bonded Ceramics-Based Concrete Structural Members in Marine Environment

2014 ◽  
Vol 1044-1045 ◽  
pp. 189-194
Author(s):  
Zhong Xin Li ◽  
Qi Dong ◽  
Zhuo Bin Wei
Keyword(s):  
Marine Environment ◽  
Accumulation Rate ◽  
Chloride Ion ◽  
Structural Members ◽  
Ion Permeability ◽  
Chloride Ion Penetration ◽  
Corrosion Experiment ◽  
Electric Flux ◽  
Astm C1202 ◽  
Weight Loss Ratio

In order to study the durability of reinforced chemically bonded ceramics-based concrete structural members in marine environment, both the experiment of chloride ion permeability-resistance and rapid corrosion experiment of rebar in the CBC concrete were conducted. The methods of ASTM C1202,RCM and NEL were used to comprehensively assess the ability of chloride ion permeability-resistance of CBC concrete, electric flux and unsteady migration coefficients were taken as estimate indexes, while in the rapid corrosion experiment of rebar under the condition of immersing-drying circulating, rusty accumulation rate and weight loss ratio were taken as estimate indexes. The results of experiments indicate that CBC concrete has strong resistibility for chloride ion penetration, however, it cannot protect the internal rebar effectively, for the reason that the rebar in this test has been seriously corroded.

Preparation of Slag Reactive Powder Concrete and the Research on its Resistance to Chloride Ion Permeability

2011 ◽  
Vol 391-392 ◽  
pp. 1189-1194 ◽  
Author(s):  
Tao Shi ◽  
Su Wei ◽  
Jia Yan Shen ◽  
Qing Ye
Keyword(s):  
High Performance ◽  
Chloride Ion ◽  
Reactive Powder Concrete ◽  
Ion Permeability ◽  
X Ray Diffraction ◽  
Compact Structure ◽  
X Ray ◽  
New Type ◽  
Reactive Powder ◽  
Chlorine Ion

Basing on the basic preparation principle of reactive powder concrete, through mixing the new active component of slag, this thesis aims to confect new-type cement-based material with super high performance. As illustrated from the experiments of resistance to chlorine ion permeability, this type of concrete is with extremely compact structure and higher resistance to chlorine ion permeability compared with other cement-based materials. Silica fume presents the most important promotion effect on its resistance to chlorine ion permeability. Steel fiber and standard sand also help to enhance its impermeability. Through the analysis and the research on microstructure realized by X-ray Diffraction, mercury penetration experiment and SEM, all these views have been proved.

Strength and durability of rapid set PVA fiber reinforced LMC for pavement repair

2019 ◽  
Vol 27 (4) ◽  
pp. 179-188
Author(s):  
Ki-Won Kim ◽  
Chan Yu ◽  
Jae-Woong Han ◽  
Chan-Gi Park
Keyword(s):  
Abrasion Resistance ◽  
Volume Fraction ◽  
Chloride Ion ◽  
Strength Properties ◽  
Concrete Pavements ◽  
Emergency Repair ◽  
Chloride Ion Penetration ◽  
Strength And Durability ◽  
Pva Fiber ◽  
Styrene Butadiene

This study evaluated the strength properties, chloride ion permeability and abrasion resistance of styrene–butadiene latex-modified polyvinyl alcohol (PVA) fibre-reinforced rapid-set cement concrete (LMFRRSC) for application to emergency repair of concrete pavements. Experiments were conducted to measure the compressive strength, flexural strength, splitting tensile strength, bond strength, chloride ion penetration and abrasion resistance of LMFRRSC for variable PVA fibre content (0, 0.05 and 0.10%); test results showed that these test parameters increased with the volume fraction of PVA fibre, satisfying all traffic-opening criteria for emergency concrete pavement repair. The PVA fibre additive effectively minimized crack formation generated as a result of high hydration heat in the early material stages and inhibited fibre ball development. Thus, the addition of PVA fibre enhanced the performance of LMFRRSC for emergency repair of concrete pavements.

scholarly journals The Chloride Ion Penetration Mechanism in Basalt Fiber Reinforced Concrete under Compression after Elevated Temperatures

2021 ◽  
Vol 11 (21) ◽  
pp. 10137
Author(s):  
Limin Lu ◽  
Shaohua Wu ◽  
Yuwen Qin ◽  
Guanglin Yuan ◽  
Qingli Zhao ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Elevated Temperatures ◽  
Coupling Effect ◽  
Basalt Fiber ◽  
Chloride Ion ◽  
Fiber Reinforced Concrete ◽  
Ion Permeability ◽  
Ion Content ◽  
Chloride Ion Penetration ◽  
Ion Penetration

Chloride ion penetration frequently leads to steel corrosion and reduces the durability of reinforced concrete. Although previous studies have investigated the chloride ion permeability of some fiber concrete, the chloride ion permeability of the basalt fiber reinforced concrete (BFRC) has not been widely investigated. Considering that BFRC may be subjected to various exposure environments, this paper focused on exploring the chloride ion permeability of BFRC under the coupling effect of elevated temperatures and compression. Results demonstrated that the chloride ion content in concrete increased linearly with temperature. After exposure to different elevated temperatures, the chloride ion content in BFRC varied greatly with increasing stress. The compressive stress ratio threshold for the chloride ion penetration was measured. A calculation model of BFRC chloride ion diffusion coefficient under the coupling effect of elevated temperatures and mechanical damage (loading test) was proposed.

Examining the Effect of Asphalt Plant Surplus Filler on Water and Chloride Ion Permeability of Cement Mortar

2018 ◽  
Vol 765 ◽  
pp. 383-390
Author(s):  
Hadi Vafaeinejad ◽  
Mahdi Kioumarsi
Keyword(s):  
Electrical Resistivity ◽  
Reinforced Concrete ◽  
Electrical Resistance ◽  
Cement Mortar ◽  
Concrete Structures ◽  
Chloride Ion ◽  
Partial Replacement ◽  
Reinforced Concrete Structures ◽  
Ion Permeability ◽  
Chloride Ion Penetration

The penetration of water and chloride ion into the concrete is of factors that cause rust and corrosion in rebars by reaching the existing reinforcement surface in reinforced concrete structures. In this study, effect of using Asphalt Plant Surplus Filler as a partial replacement of cement with replacement values of 0, 5, 10, 15 and 20% on permeability and electrical resistance of cement mortar were investigated with the aim of decreasing cement consumption. In order to determine the penetration of water, 10 cubic specimens with the size of 150 mm were made and tested. In order to determine chloride ion penetration, 20 cylindrical specimens with a length of 50 and a diameter of 100 mm were studied at the ages of 28 and 56 days. To test the electrical resistivity of cement mortar, 30 cubic specimens with the size of 100 mm were tested at the ages of 7, 28 and 56 days. According to the results of the experiments, adding filler to the cement mortar enhances the penetration of water and chloride ion. Electrical resistivity generally increases with the increase of specimen age. Furthermore, the filler increment indicates the reduction of electrical resistivity.

Contribution of rice husk ash to the performance of polymer mortar and polymer concrete

2013 ◽  
Vol 33 (4) ◽  
pp. 377-387 ◽  
Author(s):  
Md. Mostafizur Rahman ◽  
Md. Akhtarul Islam
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Chloride Ion ◽  
Morphological Properties ◽  
Experimental Result ◽  
Polymer Concrete ◽  
Fine Aggregate ◽  
Flexural Tensile Strength ◽  
Chloride Ion Penetration ◽  
Polymer Mortar

Abstract This paper presents the effect of rice husk ash (RHA) as fine filler, partially replacing sand (fine aggregate) in the composition of epoxy resin based polymer mortar (PM) and polymer concrete (PC), to make them advantageous and lessen their adverse effects on the environment. Assessment was carried out on the basis of the mechanical (compressive, flexural, tensile strength), physical (water sorption, chloride ion penetration) and morphological (porosity) properties of polymer mortar and polymer concrete. The microstructure of the PM specimens (with RHA and without RHA) is examined by scanning electron microscopy (SEM). The amount of RHA in the composition of PM and PC is optimized. The experimental result shows that the optimum replacement of sand by RHA in the composition of PM and PC has a favorable influence on mechanical, physical and morphological properties of the mortar and concrete.

scholarly journals The Performance of Carbonation-Cured Concrete

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3729
Author(s):  
Zhen Li ◽  
Zhen He ◽  
Xiaorun Chen
Keyword(s):  
Compressive Strength ◽  
Abrasion Resistance ◽  
Ph Value ◽  
Chloride Ion ◽  
Co2 Uptake ◽  
Ion Permeability ◽  
Micro Hardness ◽  
Steel Bar ◽  
Carbonation Curing ◽  
Better Than

The research shows that carbonation-cured concrete has several mechanical and durability properties that are better than those of moisture-cured concrete. However, many properties of carbonation-cured concrete have not yet been studied. In this research, carbonation-cured concrete was prepared by pre-curing, carbonation curing, and then moisture curing. The compressive strength, CO2 uptake, pH value, chloride ion permeability and abrasion resistance of the carbonation-cured concrete were investigated. Results showed that the compressive strength of carbonation-cured concrete was more than 10% higher than that of moisture-cured concrete at the same age; a steel bar is stable in carbonation-cured concrete; and carbonation-cured concrete exhibited better abrasion resistance and chloride ion permeability than that of moisture-cured concrete. The optimization of pore structure and improvement in the micro-hardness are the reasons for the improved chloride ion permeability and abrasion resistance of carbonation-cured concrete.

Performance of Polyaspartic Ester Polyurea in Marine Engineering Protection

2011 ◽  
Vol 66-68 ◽  
pp. 1533-1538
Author(s):  
Lin Yang ◽  
Ping Lu
Keyword(s):  
Permeability Coefficient ◽  
Microscopic Analysis ◽  
Chloride Ion ◽  
Diffusion Method ◽  
Ion Permeability ◽  
Marine Structures ◽  
Chloride Ion Penetration ◽  
Marine Concrete ◽  
Marine Engineering ◽  
Engineering Protection

In this work, the natural diffusion method and rapid chloride ion penetration method (RCM) are used to study the performance of polyaspartic aster (PAE) coating in marine structures protection. The ability of concrete resistance chloride ion permeability in marine environment is tested by such two methods. The results obtained by the two methods are compared, they agree well. The paper also study the change chloride ion permeability coefficient of marine concrete with different coating thickness and use scanning electron microscopy (SEM) to microscopic analysis. From microscopic research, only a few tiny holes appear in the sample section after 6 months corrosion. Compared with the samples without corrosion, the PAE coating still remains homogeneous and dense.

Study on Influence of Freeze-Thaw for Chlorion Penetration

2014 ◽  
Vol 578-579 ◽  
pp. 1295-1298
Author(s):  
Zhen Qiang Wang ◽  
Ya Na Zhang ◽  
Yan Liu
Keyword(s):  
Concrete Strength ◽  
Chloride Ion ◽  
Plain Concrete ◽  
Freezing And Thawing ◽  
Freeze Thaw ◽  
Chloride Diffusivity ◽  
Chloride Ion Penetration ◽  
Freezing And Thawing Cycles ◽  
Relationship Of ◽  
The Relationship

Freeze-thaw cycles can affect the chloride diffusivity of concrete to a certain extend. The experimental study of plain concrete specimens with different strength grade were carried out, suffering 0, 50, 100 and 150 cycles of freeze-thaw. Chloride ion penetration under different strength, different cycle-index and the concrete mass-loss caused by freeze-thaw cycles are analyzed. Using this method the relationship of chlorion permeability with concrete strength is established when the concrete specimens reach to a particular value of freezing and thawing cycles.

Resistance of Polymer (PET) - Mortar Composites to Aggressive Solutions

2011 ◽  
Vol 5 ◽  
pp. 1-15 ◽  
Author(s):  
A.S. Benosman ◽  
M. Mouli ◽  
H. Taïbi ◽  
M. Belbachir ◽  
Y. Senhadji
Keyword(s):  
Composite Materials ◽  
Tap Water ◽  
Chloride Ion ◽  
Ion Permeability ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Attack ◽  
Chloride Ion Penetration ◽  
Ft Ir ◽  
Basic Solutions

This paper describes an innovative use of plastic bottle waste as cement-substitution within composite materials for preventing chemical attacks or repairing various reinforced concrete structures. Various weight fractions of cement varying from 2.5% to 7.5% were substituted by the same weight of polyethylene terephthalate (PET). The specimens were tested in flexure and compressive strength and for chemical resistance to acid, basic solutions at 5% and for chloride ion permeability. From this study, it was found that the PET-modified mortars exposed to aggressive environments showed better resistance to chemical attack and higher resistance to chloride ion penetration than unmodified one without substantially affecting the mechanical strength in tap water. The addition of PET to the modified mortars, means reducing the penetration of aggressive agents. So, the mass loss of composites exposed to hydrochloric and acetic acid solutions is lower than those of unmodified mortar. The basic solutions are harmless for composite materials. The formations which appear such as different calcium salts were determined by X-ray diffraction and FT-IR.

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