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2019-11-6EFFECTS OF DEICERS ON CONCRETE DETERIORATION By David Darwin JoAnn Browning Lien Gong Sean R. Hughes A Report on Research Sponsored by the and Materials Laboratory University of Kansas Structural Engineering and Materials Laboratory SL Report 07-3 December 2007 THE UNIVERSITY OF KANSAS CENTER FOR RESEARCH INC
CiteSeerX - Document Details Isaac Councill Lee Giles Pradeep Teregowda The deleterious effects of deicers on concrete pavements and bridges have concerned concrete researchers for several decades. The present study experimentally investigates the effects of different deicers on concrete deterioration. Laboratory simulations of environmental conditions wetdry and freeethaw cycling
Such risks of deicers on the durability of Portland cement concrete PCC structures and pavements exist through three main pathways 1 physical deterioration of the concrete through such effects as salt scaling 2 chemical reactions between deicers and cement paste a cation-oriented process especially in the presence of Mg 2 and Ca 2
The physical effects of deicers on concrete are mainly manifested in increased damage from freee-thaw cycling while the chemical effects include detrimental reactions between the deicers and the cement paste aggravation of expansive aggregate-cement reactions
2018-6-1Chemical Deicers and Concrete Pavement Impacts and Mitigation In the last decade concerns have been raised regarding the potential for deleterious effects of certain chemical deicers most notably MgCl. 2. and CaCl. 2 on concrete. Chemical deicers based on MgCl. 2. and CaCl. 2. are becoming increasingly popular due to their relatively low
2008-5-16The Deleterious Chemical Effects of Concentrated Deicing Solutions on Portland Cement Concrete Guidelines - 3 - Concrete Deterioration in the Presence of Deicing Chemicals There are two general forms of deterioration that can occur when concrete is exposed to high concentrations of chloride-based deicing chemicals
2014-9-11concrete are compared by combining exposure procedures that were originally developed to allow deicing chemicals to rapidly penetrate concrete corrosion specimens with techniques that are used to evaluate the physical effects of cyclic Title no. 105-M70 Effects of Deicers on Concrete Deterioration
Concrete specimens were exposed to weekly cycles of wetting and drying in distilled water and in solutions of sodium chloride calcium chloride magnesium chloride and calcium magnesium acetate with either a 6.04 molal ion concentration equivalent in ion concentration to a 15 solution of NaCl or a 1.06 molal ion concentration equivalent in ion concentration to a 3 solution of NaCl for
The paper presents the results of an investigation of the effects of concentrated calciummagnesium acetate CMA solutions on concrete. Concrete specimens were manufactured following guidelines for structures exposed to freeethaw cycles and deicers watercement ratio wc0.45 and air-entraining admixture employing two cements obtained by blending a Portland clinker with 20 of
2012-6-20YANG Quan-bingYANG Qian-rong.Effects of Salt-crystalliation of Sodium Sulfate on Deterioration of ConcreteJ.Journal of the Chinese Ceramic Society2007357877-885. 11.J.2007104392-396
2020-5-21Types and Causes of Concrete Deterioration The exceptional durability of portland cement concrete is a major reason why it is the worlds most widely used construction material. But material limitations design and construction practices and severe exposure conditions can cause concrete to deteriorate which may result in aesthetic
Effects of Deicers on Concrete Deterioration. For periods of up to 95 weeks concrete specimens were exposed to weekly wetting and drying cycles in either distilled water or in solutions of sodium chloride NaCl calcium chloride CaCl sub 2 magnesium chloride MgCl sub 2 and calcium magnesium acetate CMA with either a 1.06 molal ion concentration equivalent in iron concentration to a 3
2013-3-22properties of concrete will review the recently completed laboratory study on the effects of magnesium and calcium chlorides on the properties of concrete Part 2 J. Weiss will review the impact of fluid transport on pavement joint deterioration and will discuss the issues related to applicability of accelerated tests to field conditions
2020-1-22UNDERSTANDING AND MITIGATING EFFECTS OF CHLORIDE DEICER EXPOSURE ON CONCRETE 5. Report Date -September 2014- 6. Performing Organiation Code 7. AuthorsXianming Shi Ning Xie Yudong Dang Anburaj Muthumani Jiang Huang Adam Hagel Shane Forsythe Eliabeth Selig Dustin Falk Eli McVey Amanda Kessel Callie Martins Yan Zhang Yida Fang 8
2018-9-52 Chemical Deicers and Concrete Pavement Impacts and Mitigation In the last decade concerns have been raised regarding the potential for deleterious effects of certain chemical deicers most notably MgCl 2 and CaCl 2 on concrete. Chemical deicers based on MgCl 2 and CaCl 2 are becoming increasingly popular due to their relatively low
2013-10-30Deleterious Chemical Effects of Deicing Solutions on Concrete Pavements NOVEMBER 2010 Deterioration of the concrete specimens resembled that seen for the mortar specimens gures 7-8. In all cases the cubes exposed to different deicers. by deicing chemicals concrete mixtures containing 15 Class F y ash were next best and
Researchers at the University of Kansas sought to answer this question once and for all in a recent study on the effects of deicers on concrete deterioration. They exposed samples of concrete to four of the most common deicing agents sodium chloride calcium chloride magnesium chloride and calcium magnesium acetate
2018-7-183. Concrete technology Several laboratory studies have demonstrated the benefit of using supplementary cementitious materials to reduce the impact from deicinganti-icing chemicals. Fly ash reacts with available lime and alkali in concrete producing additional cementitious compounds C -S-H and hence reduces the pore interconnectivity of
The results of a study conducted in the mid-1950s show that its not high concentrations of deicers that cause the heaviest scaling but relatively low amounts in the range of 2 to 4. In the study non-air-entrained concrete was tested after exposure to 25 freee-thaw cycles and air-entrained concrete was tested after exposure to 50 and 200
2019-4-8JOINt DeterIOrAtION IN CONCrete PAvemeNtS 13 joints before sealing could also contribute to joint deterioration problem. The material properties of effects of deicers on concrete deterioration conclude that calcium chloride is the most aggressive deicer followed by magnesium chloride and sodium chloride Jain Janus Olek Jowiak
Concrete specimens were exposed to weekly cycles of wetting and drying in distilled water and in solutions of sodium chloride NaCl calcium chloride CaCl2 magnesium chloride MgCl2 and calcium magnesium acetate CMA with either a 6.04 molal ion concentration equivalent in ion concentration to a 15 solution of NaCl or a 1.06 molal ion concentration equivalent in ion concentration to
The deleterious effects of deicers on concrete pavements and bridges have concerned concrete researchers for several decades. The present study experimentally investigates the effects of different
2013-5-30Concrete Deterioration Reinforced concrete is a very versatile construction material. Properly designed concrete structures are both strong and durable. However concrete structures are vulnerable to a number of factors that can cause deterioration. Deterioration can result in
While the exact mechanism of salt damage is not known a number of well understood related factors instigated by exposure to salt contribute to the deterioration of concrete. Salt is a mild acid and lowers the pH in the concrete. The acidic reaction attacks the concrete paste and aggregate weakening the structure and strength of the concrete
2018-8-15The role of magnesium in concrete deterioration Guoliang Gan Iowa State University Follow this and additional works athttpslib.dr.iastate.edurtd Mechanism of Magnesium Chloride Attack on Concrete 31 A brief review of the effects of magnesium chloride Another potential factor is the deicers applied to reduced haards of winter snow
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