Improving the chloride binding capacity of cement paste by adding nano-Al2O3

2019 ◽  
Vol 195 ◽  
pp. 415-422 ◽  
Author(s):  
Zhiqiang Yang ◽  
Yun Gao ◽  
Song Mu ◽  
Honglei Chang ◽  
Wei Sun ◽  
...  
Keyword(s):  
Cement Paste ◽  
Binding Capacity ◽  
Chloride Binding

Effect of triethanolamine on the chloride binding capacity of cement paste with a high volume of fly ash

2021 ◽  
pp. 125612
Author(s):  
Yibiao Teng ◽  
Songhui Liu ◽  
Zhaocai Zhang ◽  
Jiangwei Xue ◽  
Xuemao Guan
Keyword(s):  
Fly Ash ◽  
Cement Paste ◽  
Binding Capacity ◽  
High Volume ◽  
Chloride Binding

scholarly journals Chloride-Binding Capacity of Portland Cement Paste Blended with Synthesized CA2 (CaO·2Al2O3)

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Yunsu Lee ◽  
Mingyun Kim ◽  
Zhengxin Chen ◽  
Hanseung Lee ◽  
Seungmin Lim
Keyword(s):  
Portland Cement ◽  
Cement Paste ◽  
Binding Capacity ◽  
Water Soluble ◽  
Chloride Binding ◽  
X Ray Diffraction ◽  
Total Chloride ◽  
X Ray ◽  
Isotherm Equation ◽  
Portland Cement Paste

A chloride-binding capacity is the major factor to mitigate the ingress of chloride into concrete. This paper presents the chloride-binding capacity of Portland cement paste containing synthesized CA2 (CaO·2Al2O3). The CA2 was synthesized in the high-temperature furnace and characterized by X-ray diffraction for inspecting the purity. The synthesized CA2 was substituted for Portland cement by 0%, 5%, and 10% by weight, and the NaCl solution was used as an internal chloride, which is assumed as a total chloride. The chloride-binding capacity of cement paste was calculated from a water-soluble chloride extraction method by the application of the Langmuir isotherm equation. And the hydration products were analyzed using X-ray diffraction and thermogravimetric analysis. We demonstrate that the CA2 increases an AFm phase in the Portland cement system, and the incorporation of CA2 consequently enhances the chloride-binding capacity of cement paste samples.

Chloride binding capacity of various hydrated cement paste systems

1997 ◽  
Vol 6 (1) ◽  
pp. 28-35 ◽  
Author(s):  
Anik Delagrave ◽  
Jacques Marchand ◽  
Jean-Pierre Ollivier ◽  
Simone Julien ◽  
Kati Hazrati
Keyword(s):  
Cement Paste ◽  
Binding Capacity ◽  
Hydrated Cement ◽  
Chloride Binding ◽  
Hydrated Cement Paste

Influence of LDHs on Chloride Ion Binding in Cementitious Materials

2014 ◽  
Vol 599 ◽  
pp. 34-38 ◽  
Author(s):  
Ping Duan ◽  
Zhong He Shui ◽  
Guo Wei Chen
Keyword(s):  
Cement Paste ◽  
Binding Capacity ◽  
Mixing Time ◽  
Reference Sample ◽  
Chloride Ion ◽  
Cementitious Materials ◽  
Initial Time ◽  
Ion Binding ◽  
Chloride Binding ◽  
Double Hydroxides

Layered double hydroxides (LDHs) materials could be used in cement and concrete for their ions capturing capacity and to enhance durability of concrete. In this work, properties and chloride binding capacity of different types of LDHs were compared, micro-mechanism of chloride binding of LDHs were analyzed and chloride binding of cement paste incorporating LDHs were investigated. The experimental results show that Mg-Al-NO3 LDHs presents higher chloride ion binding capacity at initial time compared to LDOs calcinated at 500 °C while ion binding capacity of LDHs calms down and LDOs increases with increasing mixing time. Cement paste incorporating LDHs presents higher chloride binding capacity compared with reference sample. All types of LDHs performed beneficial effect on the chloride penetration resistance especially with addition of 1% Mg-Al-NO3 LDOs.

Chloride Binding Capacity of Cement Paste Containing Layered Double Hydroxide (LDH)

2012 ◽  
Vol 40 (5) ◽  
pp. 20120054 ◽  
Author(s):  
Shui Zhonghe ◽  
Ma Juntao ◽  
Chen Wei ◽  
Chen Xiaoxing
Keyword(s):  
Layered Double Hydroxide ◽  
Cement Paste ◽  
Binding Capacity ◽  
Chloride Binding ◽  
Double Hydroxide

Influence of Lime Dust on Chloride Binding Capacity of Fly Ash-Cement Paste

2011 ◽  
Vol 399-401 ◽  
pp. 1191-1195
Author(s):  
Xiang Hao Wu ◽  
Shan Shan Yang ◽  
Cong Kai Zhang ◽  
Pan Yuan
Keyword(s):  
Fly Ash ◽  
Adsorption Capacity ◽  
Cement Paste ◽  
Adsorption Equilibrium ◽  
Binding Capacity ◽  
Physical Adsorption ◽  
Dust Content ◽  
Chloride Binding ◽  
Cement Pastes ◽  
Chemical Combination

The influence of the way and the volume of adding lime dust to fly ash-cement pastes on chloride physical adsorption capacity, chemical combination capacity and binding capacity of fly ash-cement pastes is investigated by adsorption equilibrium method. The results show that with the volume of lime dust as cement replacement raising, the amount of chloride physically adsorbed by fly ash-cement pastes reduces, while the amount of chloride chemical combining is firstly increase, and then decrease, and it reaches the maximum when the lime dust content is 10% , that of chloride binding is firstly increase, and then decrease, which reaches the maximum when the lime dust content is 5%. In addition, with the volume of lime dust as fly ash replacement increasing , the volume of chloride physically adsorbed by fly ash-cement pastes reduces firstly, and then raises, reaching the minimum when the lime dust content is 6%. Whereas, volume of chloride chemical combining and binding both decrease gradually with the increase of lime dust contents. When the population of lime dust as cement or fly ash replacement is low(less than 15% for cement and 9% for fly ash), effect of lime dust content on chloride binding capacity of fly ash-cement pastes is not obvious (under 7.5%).

Improving the chloride binding capacity of cement paste by adding nano-Al2O3: The cases of blended cement pastes

2020 ◽  
Vol 232 ◽  
pp. 117219 ◽  
Author(s):  
Zhiqiang Yang ◽  
Shiyu Sui ◽  
Liguo Wang ◽  
Taotao Feng ◽  
Yun Gao ◽  
...  
Keyword(s):  
Cement Paste ◽  
Binding Capacity ◽  
Blended Cement ◽  
Chloride Binding ◽  
Cement Pastes

Chloride Binding of Cementitious Pastes

2010 ◽  
Vol 152-153 ◽  
pp. 363-367
Author(s):  
Ke Feng Tan ◽  
Qing Cao
Keyword(s):  
Cement Paste ◽  
Binding Capacity ◽  
Steel Slag ◽  
Chloride Concentration ◽  
Solution Concentration ◽  
Test Method ◽  
Mineral Admixtures ◽  
Chloride Binding ◽  
Test Results ◽  
Blastfurnace Slag

An experiment was undertaken to investigate the effect of mineral admixtures, w/b, external chloride solution concentration, and carbonation on chloride binding capacity of cementitious paste. The test method was based on equilibrium method. Test results show that incorporating metakaolin, blastfurnace slag, steel slag, and flyash increases chloride binding capacities by 65.9%, 55.3%, 43.9%, and 26.8% respectively. Increasing external chloride concentration and w/c ratio can improve the chloride capacity of pure cement paste. Carbonation of cement paste will reduce the chloride capacity. Chloride binding do affect the durability of reinforced concrete in saline environment.

Distance-associated chloride binding capacity of cement paste subjected to natural diffusion

2016 ◽  
Vol 112 ◽  
pp. 925-932 ◽  
Author(s):  
Zijian Song ◽  
Linhua Jiang ◽  
Ziming Zhang ◽  
Chuansheng Xiong
Keyword(s):  
Cement Paste ◽  
Binding Capacity ◽  
Chloride Binding
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