Effect of Super-Absorbent Polymer as Admixture on the Mechanical Properties of Mortars

2011 ◽  
Vol 306-307 ◽  
pp. 1683-1687
Author(s):  
Tao Yang ◽  
Na Sun ◽  
Wen Juan Guo ◽  
Jin Zhang ◽  
Mei Shan Pei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polymer Particles ◽  
Super Absorbent Polymer ◽  
Curing Methods ◽  
Curing Method ◽  
Absorbent Polymer ◽  
Better Than ◽  
The Way

Super-absorbent polymer particles (SAPs) were used as a self-curing admixture for mortars. The effect of SAPs on mechanical properties of mortars was investigated. The performance of the mortars with SAPs added by two different ways was tested, which showed that the way of adding dried was more feasible to application. The performance of mortars with different curing methods was also tested. The results showed that SAPs in the mortars played a role of reserving water and the mechanical properties of hardened mortars with SAPs were better than those had no SAPs and exposed to the air, which suggested that incorporating SAPs can be an effective self-curing method.

The Effect of Super-Absorbent Polymer as a Self-Curing Admixture on the Performance of Mortars

2011 ◽  
Vol 287-290 ◽  
pp. 1241-1246
Author(s):  
Fa Qi Yu ◽  
Na Sun ◽  
Chao Deng ◽  
Jin Zhang ◽  
Mei Shan Pei
Keyword(s):  
Mechanical Properties ◽  
Average Diameter ◽  
Optimal Performance ◽  
Super Absorbent Polymer ◽  
Cement Based Materials ◽  
Different Ages ◽  
Absorbent Polymer ◽  
Better Than

Super-absorbent polymer (SAP) was used as a self-curing admixture for cement-based materials. Two types of super-absorbent polymer and effect of super-absorbent polymer on fluidity and mechanical properties of mortars were investigated. The performance of the mortars cured for different ages was tested. The results showed that SAP could play a role of reserving water and reserving water of SAP particles A with an average diameter of 180 mm was more effective than that of SAP particles B with an average diameter of 80 mm, the optimal performance of reserving water was obtained at 0.07 wt.% of SAP particles A; Mechanical properties of hardened mortars with SAP particles A were better than those with SAP particles B, the favorably experiment ratio was 0.05 wt.% of SAP particles A.

scholarly journals A Comparative Study on the Mechanical Properties and Microstructure of Cement-Based Materials by Direct Electric Curing and Steam Curing

2021 ◽  
Author(s):  
Zhihan Yang ◽  
Youjun Xie ◽  
Jionghuang He ◽  
Fan Wang ◽  
Xiaohui Zeng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Consumption ◽  
Pore Structure ◽  
Steam Curing ◽  
Cement Based Materials ◽  
Curing Methods ◽  
Stable Growth ◽  
Curing Method ◽  
Curing Regimes ◽  
Better Than

Direct electric curing (EC) is a new green curing method for cement-based materials that improves the early mechanical properties via the uniform high temperature produced by Joule heating. To understand the effects of EC and steam curing (SC) on the mechanical properties and microstructure of cement-based materials, the mortar was cured at different temperature-controlled curing regimes (40°C, 60°C and 80°C). Meanwhile, mechanical properties, hydrate phase and pore structure of specimens were investigated. The energy consumption of two curing methods was compared and analyzed. The results show that the EC specimens have better and more stable growth of mechanical strength. The pore structure of EC specimen is also better than that of SC specimen at different maintenance ages. However, the hydration degree and products of samples cured by EC are similar to that SC samples. The energy consumption of EC is lower than SC. This study provides an important technical support for the EC in the production of energy-saving and high early-strength concrete precast components.

scholarly journals Civil Religion or Nationalism? The National Day Celebrations in Norway

Religions ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 206
Author(s):  
Pål Ketil Botvar
Keyword(s):  
National Identity ◽  
General Population ◽  
Civil Religion ◽  
Religious Nationalism ◽  
Theoretical Concepts ◽  
Role Of Religion ◽  
Better Than ◽  
The Way

The Norwegian National Day (17 May, also referred to as Constitution Day) stands out as one of the most popular National Day celebrations in Europe. According to surveys, around seven out of every 10 Norwegians take part in a public celebration during this day. This means that the National Day potentially has an impact on the way people reflect upon national identity and its relationship to the Lutheran heritage. In this paper, I will focus on the role religion plays in the Norwegian National Day rituals. Researchers have described these rituals as both containing a significant religious element and being rather secularized. In this article, I discuss the extent to which the theoretical concepts civil religion and religious nationalism can help us understand the role of religion, or the absence of religion, in these rituals. Based on surveys of the general population, I analyze both indicators of civil religion and religious nationalism. The two phenomena are compared by looking at their relation to such items as patriotism, chauvinism, and xenophobia. The results show that civil religion explains participation in the National Day rituals better than religious nationalism.

Effect of Curing Methods on Strength and Durability Properties of M30 Grade Concrete

2021 ◽  
Vol 9 (11) ◽  
pp. 1386-1389
Author(s):  
Chidananda G
Keyword(s):  
Compressive Strength ◽  
Fresh Concrete ◽  
Hardened Concrete ◽  
Concrete Compressive Strength ◽  
Super Absorbent Polymer ◽  
Carbonation Resistance ◽  
Curing Methods ◽  
Water Curing ◽  
Strength And Durability ◽  
Absorbent Polymer

Abstract: This paper presents an experimental investigation on influence of different curing methods on the performance of M30 grade concrete. Different curing methods such as air curing, pond curing, intermittent curing, gunny bags curing, chemical curing and using Super Absorbent Polymer (SAP) by 0.3% of weight of cement are considered. Slump and compacting factor tests are performed to know the workability of fresh concrete. Compressive strength of hardened concrete is determined for concrete specimens cured by different curing methods. Durability in terms of carbonation resistance on hardened concrete is also performed as per IS 516 (Part 5/Sec 3, 2021) codal provisions. Depending upon the site conditions and availability of potable water, curing methods such as pond curing, intermittent curing, gunny bags curing, chemical curing and SAP curing can be adopted in site to achieve the expected strength and durability requirements. Keywords: Curing methods, Compressive strength and Carbonation resistance.

Effect of super absorbent polymer on microstructural and mechanical properties of concrete blends using granite pulver

2020 ◽  
Author(s):  
Lija Rajamony Laila ◽  
Beulah Gnana Ananthi Gurupatham ◽  
Krishanu Roy ◽  
James B. P. Lim
Keyword(s):  
Mechanical Properties ◽  
Super Absorbent Polymer ◽  
Absorbent Polymer

Experimental Investigation on Mix Design and Mechanical Properties of Polymer (Latex) Modified Concrete

2013 ◽  
Vol 687 ◽  
pp. 112-117 ◽  
Author(s):  
Farhad Nabavi ◽  
Shami Nejadi ◽  
Bijan Samali
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Compressive Strength ◽  
Mix Design ◽  
Modulus Of Rupture ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Antifoaming Agent ◽  
Curing Methods ◽  
Curing Method

This paper presents the experimental investigation to enhance the mechanical properties of Polymer Modified Concrete (PMC) incorporating Styrene Butadiene Rubber (SBR) and describes the potential of using PMC as a structural material. PMC has been used for many years as an over layer in the bridges deck or for the repairing the defected concrete structures subjected to marine environment. But, because of low compressive strength due to foaming phenomenon, PMC has not been considered as a structural concrete. In this study, a range of investigations including sensitivity of PMC to water cement ratio, the effect of SBR proportion on compressive strength and modulus of rupture, selection of the proper antifoaming agent, the effect of various curing methods on compressive strength, proper mix design of PMC to achieve medium to high compressive strength are carried out. Also, the instructions for casting PMC are composed which can be stated as a standard for mixing and curing procedure of PMC. Results show that increasing the proportion of latex in PMC causes the strength reduction. But, using appropriate antifoaming agent (defoamer) and proper curing method, the mechanical properties can be recovered remarkably.

scholarly journals A Comparative Study on the Mechanical Properties and Microstructure of Cement-Based Materials by Direct Electric Curing and Steam Curing

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7407
Author(s):  
Zhihan Yang ◽  
Youjun Xie ◽  
Jionghuang He ◽  
Fan Wang ◽  
Xiaohui Zeng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Consumption ◽  
Hydration Degree ◽  
Steam Curing ◽  
Cement Based Materials ◽  
Curing Methods ◽  
Temperature Controlled ◽  
Stable Growth ◽  
Curing Method ◽  
Curing Regimes

Direct electric curing (EC) is a new green curing method for cement-based materials that improves the early mechanical properties via the uniform high temperature produced by Joule heating. To understand the effects of EC and steam curing (SC) on the mechanical properties and microstructure of cement-based materials, the mortar was cured at different temperature-controlled curing regimes (40 °C, 60 °C, and 80 °C). Meanwhile, the mechanical properties, hydrates and pore structures of the specimens were investigated. The energy consumption of the curing methods was compared. The results showed that the EC specimens had higher and more stable growth of mechanical strength. The hydration degree and products of EC samples were similar to that of SC samples. However, the pore structure of EC specimens was finer than that of SC specimens at different curing ages. Moreover, the energy consumption of EC was much lower than that of SC. This study provides an important technical support for the EC in the production of energy-saving and high early-strength concrete precast components.

Research on Appropriate Content of Super Absorbent Polymer Added of Marine Concrete

2014 ◽  
Vol 501-504 ◽  
pp. 2116-2119 ◽  
Author(s):  
Shuang Jun Xing ◽  
Hai Chao Fan ◽  
Jun Zheng ◽  
Bin Jun Guan
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Free Water ◽  
Hydration Process ◽  
Super Absorbent Polymer ◽  
Marine Concrete ◽  
Absorbent Polymer ◽  
Gap Structure

Through the mechanical properties experiments and analyses of ordinary marine concrete and marine concrete with fly ash added, it was thought that the proper content of SAP added could release free water for cement particles to continue hydrating during the curing stage, guarantee adequate water. So, SAP could significantly improve the performances of marine concrete. As to marine concrete with fly ash added, because part of fly ash took part in hydration process of cement particles and another part filled in gap structure of concrete, the appropriate content of SAP added was different from ordinary marine concrete and it should be according to the amount of fly ash added.

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