The Effect of Sodium Hydroxide Molarity and Other Parameters on Water Absorption of Geopolymer Mortars

Objective: Durability one of the critical role effect in geopolymer serviceability. The capability of water to penetrate the mortar microstructure is mainly used to measure the durability, which also called permeability. Methods/Statistical Analysis: The influence of sodium hydroxide (NaOH) molarity, alkali Solution to Binder ratio (S:B), binder to aggregate ratio (B:A) and sodium silicate to sodium hydroxide ratio (NS:NH) on water absorption of Geopolymer Mortar (GPMs) are investigated in this article. Geopolymer mortar specimens of different NaOH molarity, S:B, B:A, and NS:NH were prepared and cured at different temperatures, 27°C and 60°C. Granulated blast furnace slag, fly ash, waste ceramic and waste glass bottle were used as a binder and mixed with river sand as fine aggregate. Findings: The results of experimental indicated that water absorption significantly affected of curing temperatures. The lower water absorption results were observed of the samples cured at ambient temperature (27°C) compared to samples cured at oven temperature (60°C). Applications/Improvements: The geopolymer specimens’ water absorption observed positively enhanced with increase concentration of alkaline solution.

[1]  H. Brouwers,et al.  Development of cement-based lightweight composites - Part 2: Durability-related properties , 2013 .

[2]  G. D. Schutter,et al.  Evaluation of water absorption of concrete as a measure for resistance against carbonation and chloride migration , 2004 .

[3]  Mahmood Md. Tahir,et al.  Preferred test methods to select suitable surface repair materials in severe climates , 2014 .

[4]  Mohammad Ismail,et al.  POTENTIAL USE COCONUT MILK AS ALTERNATIVE TO ALKALI SOLUTION FOR GEOPOLYMER PRODUCTION , 2016 .

[5]  Göran Fagerlund,et al.  A service life model for internal frost damage in concrete , 2004 .

[6]  L. Parrott.  Variations of water absorption rate and porosity with depth from an exposed concrete surface: Effects of exposure conditions and cement type , 1992 .

[7]  B. Vijaya Rangan,et al.  Low-Calcium fly ash-based geopolymer concrete: Long-term properties , 2006 .

[8]  L. J. Parrott,et al.  Water absorption in cover concrete , 1992 .

[9]  Mohd Warid Hussin,et al.  Influence of different curing temperatures and alkali activators on properties of GBFS geopolymer mortars containing fly ash and palm-oil fuel ash , 2016 .

[10]  Mohammad Ismail,et al.  Effect of metakaolin replaced granulated blast furnace slag on fresh and early strength properties of geopolymer mortar , 2016, Ain Shams Engineering Journal.

[11]  S. Kolias,et al.  The effect of paste volume and of water content on the strength and water absorption of concrete , 2005 .

[12]  Somnath Ghosh,et al.  EFFECT OF WATER ABSORPTION, POROSITY AND SORPTIVITY ON DURABILITY OF GEOPOLYMER MORTARS , 2009 .

[13]  Jamal M. Khatib,et al.  Absorption characteristics of concrete as a function of location relative to casting position , 1995 .

[14]  Jahangir Mirza,et al.  Evaluation of high-performance porous concrete properties , 2012 .

[15]  Saurabh Dange,et al.  Geopolymer Concrete - A Review , 2017 .

[16]  G. Cowin,et al.  Validation of Mualem’s Conductivity Model and Prediction of Saturated Permeability from Sorptivity , 2008 .

[17]  Mohd Warid Hussin,et al.  Synthesis and characterization of shelf-healing mortar with modified strength , 2015 .