scholarly journals Influence of Super Absorbent Polymer on the Mechanical Property of High Performance Concrete

2015 ◽  
Author(s):  
Junhong Shan ◽  
Shaowu Guo
Keyword(s):  
Mechanical Property ◽  
High Performance ◽  
High Performance Concrete ◽  
Super Absorbent Polymer ◽  
Absorbent Polymer

scholarly journals Synergetic effect of a super-absorbent polymer and a calcium nitrite corrosion inhibitor in high performance concrete durability

2020 ◽  
Vol 10 (2) ◽  
pp. 206-218
Author(s):  
Alejandro Duran Herrera ◽  
Jennifer Anette Canul-Polanco ◽  
Rogelio Dávila-Pompermaye ◽  
Lucio Guillermo López-Yépez ◽  
Pedro Leobardo Valdez-Tamez
Keyword(s):  
Electrical Resistivity ◽  
Corrosion Inhibitor ◽  
High Performance ◽  
High Performance Concrete ◽  
Synergetic Effect ◽  
Autogenous Shrinkage ◽  
Concrete Durability ◽  
Super Absorbent Polymer ◽  
Calcium Nitrite ◽  
Absorbent Polymer

In this research, the synergetic effect of a super-absorbent polymer in combination with a calcium nitrite corrosion inhibitor were evaluated as a combined technology to improve concrete durability in High Performance Concrete. For this purpose, Portland cement mortars with a water/cement ratio of 0.4 and a substitution of 9.5% of cement by silica fume were produced. The effect of this technologies was evaluated by measuring the following parameters: autogenous and drying shrinkage, surface electrical resistivity and the non-steady-state chloride migration coefficient. The results indicate that the synergistic effect of SAP + CNI improves autogenous shrinkage and surface electrical resistivity.

Mechanical Property Study of Brine Corroded High Performance Concrete (HPC)

2013 ◽  
Vol 405-408 ◽  
pp. 2865-2870 ◽  
Author(s):  
Peng Gao ◽  
Hong Fa Yu
Keyword(s):  
Mechanical Property ◽  
Compressive Strength ◽  
Inner Mongolia ◽  
High Performance ◽  
High Performance Concrete ◽  
Good Resistance ◽  
Mix Proportion ◽  
Corrosion Experiment ◽  
Salt Brine ◽  
Curing Age

4 kinds of mix proportion High performance concrete (HPC) was manufactured, whose material was produced from Inner Mongolia areas. The compressive strength and the flexural strength of HPC were obtained by the Brine Corrosion experiments. And the resistance to corrosion of HPC was analyzed by the data of Brine Corrosion experiment. Furthermore, the concrete standard curing age of HPC samples was adopted as 28d and 90d, which could impact the resistance of high performance concrete in salt brine corrosion environment. It was turned out that 4 kinds of mix proportion HPC produced a good resistance in salt brine corrosion environment. And the longer the concrete standard curing age was adopted, the better resistance in salt brine corrosion environment of HPC could produce.

Choice of Super-Absorbent Polymer Hydrogel for Cement Systems

2019 ◽  
pp. 64-70
Keyword(s):  
High Performance ◽  
Cement Composite ◽  
Superabsorbent Polymer ◽  
Super Absorbent Polymer ◽  
Nmr Relaxometry ◽  
Rheological Method ◽  
Acrylic Acids ◽  
Absorbent Polymer ◽  
The Impact ◽  
Non Destructive

The article deals with the control over the structure formation processes of cement systems through the introduction of superabsorbent polymer additives in the composition. The formation of thin polyacrylic films due to delayed polymerization of acrylic acids in aqueous solution in the cement composite structure will provide the hardening Portland cement with water reserve for hydration without loss of mobility of the mixture contributing to the reduction of shrinkage deformations and obtaining a composite with high performance properties. It is shown that for the selection of superabsorbent polymer for cement systems it is advisable to use both the rheological method and NMR relaxometry. An obvious advantage of the NMR method is the non-destructive nature of the impact on the material which makes it possible to more reliably determine the structural-kinetic parameters and analyze the features of the structure transformation over time. It is established that such an indicator as the period of viability can be used to assess the features of the structuring of acrylate super-absorbent polymers when selecting optimal concentrations of its components. Experimental and statistical models describing the dependence of the depth of structuring and the period of viability on the amount of the catalyst and the polymer part of the super-absorbent polymer are obtained.

The Influence of the Amount of Silica Fume on the Mechanical Property of Ultra-High Performance Concrete

2008 ◽  
Vol 385-387 ◽  
pp. 701-704 ◽  
Author(s):  
Jung Jun Park ◽  
Gum Sung Ryu ◽  
Su Tae Kang ◽  
Sung Wook Kim
Keyword(s):  
Mechanical Property ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Flexural Strength ◽  
Silica Fume ◽  
High Performance ◽  
Mechanical Characteristics ◽  
High Performance Concrete ◽  
Micro Structure ◽  
Ultra High Performance Concrete

Silica fume constitutes an element of extreme importance in improving the strength and fluidity of UHPC. The adopted amount of silica fume generally is generally exceeding 25% of cement in weight but the influence of this amount on the properties of UHPC is still remaining as a domain to be investigated. Accordingly, this paper investigates the effects of the amount of silica fume on the mechanical characteristics of the fluidity, compressive strength, elastic modulus and flexural strength and on the micro structure of UHPC by means of SEM and MIP. Results revealed that adequate amount of silica fume is improving the fluidity and strength. MIP tests demonstrated that such improvement is brought by the increase of hydrates due to the pozzolan reaction and the effective densification inside concrete due to the filler. It seemed also that similar mechanical characteristics can be obtained for a volumetric ratio to cement ranging between 10 and 25%.

scholarly journals Research on Fracture Toughness of C120 Ultra-High-Performance Concrete in Kingkey Financial Center Project

2012 ◽  
Vol 2012 ◽  
pp. 1-5
Author(s):  
Hao-Wen Ye ◽  
Nai-Qian Feng ◽  
Zhi-Wei Ran ◽  
Li-Xun Lin ◽  
Yan Ling-Hu ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Fracture Toughness ◽  
High Performance ◽  
High Performance Concrete ◽  
Polypropylene Fiber ◽  
Ultra High Performance Concrete ◽  
Fiber Fracture ◽  
Tsinghua University ◽  
Water Conservancy ◽  
Financial Center

By adding polypropylene fiber, fracture toughness of C120 ultra-high-performance concrete in Kingkey Financial Center project has been enhanced. The tests conducted by the Building Material Lab of the Civil and Water Conservancy Institute of Tsinghua University provided satisfactory results of mechanical property and fracture toughness of C120 ultra-high-performance concrete.

scholarly journals Improving Environmental Efficiency of Reverse Filling Cementitious Materials through Packing Optimization and Fiber Incorporation

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 647
Author(s):  
Yang Liu ◽  
Lou Chen ◽  
Keren Zheng ◽  
Qiang Yuan
Keyword(s):  
Mechanical Property ◽  
Silica Fume ◽  
Packing Density ◽  
High Performance ◽  
Steel Fiber ◽  
High Performance Concrete ◽  
Cementitious Materials ◽  
Environmental Efficiency ◽  
Fiber Reinforced Concrete ◽  
Filling System

To improve the environmental efficiency of the reverse filling system, three strategies aim to optimize the packing density, and the mechanical property were adopted in this study. Based on the compressive packing model (CPM), the relationship between the D50 ratio and maximum theoretical packing density for a reverse filling system with 25% and 30% superfine Portland cement was established. For comparison, silica fume and steel fiber were also added to the reverse filling system, respectively. The improvement of packing density by adjusting the D50 ratio was verified through the minimum water demand method, CPM, and modified Andreasen and Andersen (MAA) model. Compared to the reverse filling system added with 3 wt % silica fume, which possesses a comparable mechanical property with the optimized group (adjusted D50 ratio), the incorporation of steel fiber shows a more significant increase. The environmental efficiency of all the samples was quantified into five aspects through the calculation based on the mix proportion, compressive strength, and hydration degree. The comprehensive evaluation demonstrated that the optimized reverse filling system exerts a lower environmental impact and possesses a much higher cement use efficiency compared to the majority of ultra-high performance concrete (UHPC)/ ultra-high performance fiber-reinforced concrete (UHPFRC) reported in published papers.

Influence of Silica Fume on Mechanical Property of High Performance Concrete

2014 ◽  
Vol 584-586 ◽  
pp. 1482-1485 ◽  
Author(s):  
Yun Feng Li ◽  
Jian Zhu ◽  
Li Xu
Keyword(s):  
Mechanical Property ◽  
Silica Fume ◽  
High Performance ◽  
Volcanic Ash ◽  
High Performance Concrete ◽  
Physical Structure ◽  
Experimental Results ◽  
Silicon Material ◽  
Strength And Durability ◽  
Durability Of Concrete

Silica fume is a by-product in the production of ferrosilicon and industrial silicon material. With the ultrafine physical structure of and high volcanic ash activity, silica fume is more important admixture in concrete improving the strength and durability of concrete, and it is widely used in high performance concrete engineering. Influence of silica fume on mechanical property of high performance concrete is investigated in this paper. Experimental results show that the strength of concrete increases significantly when suitable dosages of admixtures is applied.

Experimental Study on Mechanical Properties of Steel Fiber Reinforced High Performance Concrete

2013 ◽  
Vol 859 ◽  
pp. 56-59 ◽  
Author(s):  
Yong Qiang Ma
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Flexural Strength ◽  
High Performance ◽  
Steel Fiber ◽  
High Performance Concrete ◽  
Steel Fibers ◽  
Fiber Reinforced

A large number of experiments have been carried out in this study to reveal the effect of the steel fiber dosage on the mechanical properties of HPC (high performance concrete). The mechanical property includes compressive strength, elastic modulus and flexural strength. The results indicate that the addition of steel fiber increase the compressive strength, elastic modulus and flexural strength of HPC. When the steel fiber dosage is less than 2%, these mechanical property parameters are increasing gradually with the increase of steel fiber dosage, while these parameters begin to decrease when the steel fiber dosage is more than 2%. With the development of HPC, the application of steel fibers in HPC becomes more and more popular. In the actual construction of steel fiber reinforced HPC, the dosage of steel fiber should be controlled strictly in order to ensure that the steel fibers can perform their best improvement on high performance concrete.

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