scholarly journals Effect of Alkaline Activators, Binders and Fibers on Strength Development of Geopolymer Mortar

2019 ◽  
Vol 8 (3) ◽  
pp. 4773-4780
Keyword(s):  
Portland Cement ◽  
Environmental Pollution ◽  
Sodium Hydroxide ◽  
Construction Industry ◽  
Sodium Hydroxide Solution ◽  
Alkaline Solutions ◽  
Strength Development ◽  
Fine Aggregate ◽  
Hydroxide Solution ◽  
By Products

Nowadays Environmental pollution is the major problem faced by the world. The emission of pollutants by construction industry during production of Portland cement are the main causes for environmental pollution. With the increase in use of industrial by products in our construction industry the pollution effect on environment can be reduced. Geopolymer is the one which uses by products and are environmentally friendly. In the present study to produced geopolymer the Portland cement is replaced with fly ash and fine aggregate is replaced with quarry dust and for binding materials alkaline are used. In this study for polymerization the alkaline solutions used are sodium hydroxide (NaOH) and Sodium silicate (Na2Sio3) solution. To prepare different mixes different molarities of sodium hydroxide solution i.e. 6M and 8M and comprehensive strength is calculated for each mix. The size of cube specimen considered are 150 mm x 150mm x 150mm.The comprehensive strength of geopolymer concrete specimen are tested at the age of 7,28 and 56 days. Mixes of different molarities 6M and 8M are prepared by varying the sodium hydroxide flakes amount in grams which are then cured in lab atmosphere and their strengths are calculated for 7,28 and 56 days. The results show that with the increase of the molarity of sodium hydroxide solution the comprehensive strength increases

scholarly journals Effect of NaOH Molarity on the Strength and Microstructure of Natural Pozzolan-Based AAC

2018 ◽  
Vol 203 ◽  
pp. 06017 ◽  
Author(s):  
Mohammed Ibrahim ◽  
Megat Azmi Johari ◽  
Mohammad Kalimur Rahman ◽  
Mohammed Maslehuddin ◽  
Mohamed Hatim Dafalla
Keyword(s):  
Sodium Hydroxide ◽  
Building Material ◽  
Sodium Hydroxide Solution ◽  
Alkaline Solutions ◽  
Alkali Activation ◽  
Material Research ◽  
Natural Pozzolan ◽  
Alkali Activated Binders ◽  
By Products ◽  
Alkali Activated

Alarming levels of greenhouse gas emissions has triggered change in the mode of direction of building material research. In this pursuit, alkali activated binders (AAB), synthesized by activation of industrial by products and natural materials in the presence of highly alkaline solutions, have offered viable alternative to OPC. However, there are quite a number of variables which controls the properties of these binders. Among these parameters, SS/SH ratio and molarity of sodium hydroxide solution plays a very important role in the development of these binders. Therefore, this research investigates the effect of SS/SH ratio, subsequently, molarity of SH solution on the properties of natural pozzolan based AAB. The NP was activated with sodium silicate to sodium hydroxide ratio (SS/SH) between 2.0 to 2.75. Subsequently, the molarity of SH solution was varied between 8 to 14. The development in strength was monitored on the specimens cured at 60 °C. SEM and EDS techniques were used to determine the nature of the binder formed during alkali activation. The results have shown that SS/SH ratio of 2.5 and 14 molar SH solution resulted in higher strength and finer microstructure as compared to others. Also, it was understood that there exists a suitable silica modulus of combined activator which results in higher polymerization.

The preparation of sodium 4-Amino-3-nitro-benzenesulfonate and some related compounds

1982 ◽  
Vol 35 (8) ◽  
pp. 1727 ◽  
Author(s):  
J Rosevear ◽  
JFK Wilshire
Keyword(s):  
Sodium Hydroxide ◽  
Nitro Group ◽  
Sodium Salt ◽  
Sulfonic Acid ◽  
Sodium Hydroxide Solution ◽  
Hydroxide Solution ◽  
Dilute Sodium Hydroxide ◽  
Related Compounds

The sodium salt of 4-amino-3-nitrobenzenesulfonic acid (O-nitroaniline-p-sulfonic acid) has been prepared by the action of dilute sodium hydroxide solution on ethyl [(4-chlorosulfonyl-2-nitro)- phenyllcarbamate. Central to this synthesis is the finding that the N-ethoxycarbonyl group, when located ortho to a nitro group (but not to a bromo group), is readily removed by dilute sodium hydroxide solution.

Kinetics and leaching behaviors of aluminum from pharmaceutical blisters in sodium hydroxide solution

2015 ◽  
Vol 22 (12) ◽  
pp. 4545-4550 ◽  
Author(s):  
Chong-qing Wang ◽  
Hui Wang ◽  
Guo-hua Gu ◽  
Jian-gang Fu ◽  
You-nian Liu
Keyword(s):  
Sodium Hydroxide ◽  
Sodium Hydroxide Solution ◽  
Hydroxide Solution

scholarly journals Reconstruction of the Esophagus in a Patient who Attempted Suicide by Swallowing Sodium Hydroxide Solution -Utility of DP Flap -

1997 ◽  
Vol 1997 (Supplement94) ◽  
pp. 217-225
Author(s):  
Tatsuya Fujiyoshi ◽  
Hiroyuki Masuda ◽  
Tokuji Nishinaka ◽  
Tetsuo Futami ◽  
Hiromi Shibuya
Keyword(s):  
Sodium Hydroxide ◽  
Attempted Suicide ◽  
Sodium Hydroxide Solution ◽  
Hydroxide Solution
Sign in / Sign up

Export Citation Format

Share Document