A mix design procedure for geopolymer concrete with fly ash

2016 ◽  
Vol 133 ◽  
pp. 117-125 ◽  
Author(s):  
P. Pavithra ◽  
M. Srinivasula Reddy ◽  
Pasla Dinakar ◽  
B. Hanumantha Rao ◽  
B.K. Satpathy ◽  
...  
Keyword(s):  
Fly Ash ◽  
Design Procedure ◽  
Mix Design ◽  
Geopolymer Concrete

A mix design procedure for low calcium alkali activated fly ash-based concretes

2015 ◽  
Vol 79 ◽  
pp. 301-310 ◽  
Author(s):  
M. Talha Junaid ◽  
Obada Kayali ◽  
Amar Khennane ◽  
Jarvis Black
Keyword(s):  
Fly Ash ◽  
Design Procedure ◽  
Mix Design ◽  
Low Calcium ◽  
Alkali Activated

A mix design method of fly ash geopolymer concrete based on factors analysis

2020 ◽  
pp. 121612
Author(s):  
Chenchen Luan ◽  
Xiaoshuang Shi ◽  
Kuanyu Zhang ◽  
Nodir Utashev ◽  
Fuhua Yang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Design Method ◽  
Mix Design ◽  
Geopolymer Concrete ◽  
Factors Analysis

scholarly journals A Mix Design Procedure for Alkali-Activated High-Calcium Fly Ash Concrete Cured at Ambient Temperature

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Tanakorn Phoo-ngernkham ◽  
Chattarika Phiangphimai ◽  
Nattapong Damrongwiriyanupap ◽  
Sakonwan Hanjitsuwan ◽  
Jaksada Thumrongvut ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Design Methodology ◽  
Design Procedure ◽  
Mix Design ◽  
Fly Ash Concrete ◽  
High Calcium ◽  
High Calcium Fly Ash ◽  
Alkaline Activator ◽  
Alkali Activated

This research focuses on developing a mix design methodology for alkali-activated high-calcium fly ash concrete (AAHFAC). High-calcium fly ash (FA) from the Mae Moh power plant in northern Thailand was used as a starting material. Sodium hydroxide and sodium silicate were used as alkaline activator solutions (AAS). Many parameters, namely, NaOH concentration, alkaline activator solution-to-fly ash (AAS/FA) ratio, and coarse aggregate size, were investigated. The 28-day compressive strength was tested to validate the mix design proposed. The mix design methodology of the proposed AAHFAC mixes was given step by step, and it was modified from ACI standards. Test results showed that the 28-day compressive strength of 15–35 MPa was obtained. After modifying mix design of the AAHFAC mixes by updating the AAS/FA ratio from laboratory experiments, it was found that they met the strength requirement.

scholarly journals Studi Pemanfaatan Prekursor Fly Ash Lokal pada Self Compacting Geopolymer Concrete (SCGC)

2021 ◽  
Vol 24 (2) ◽  
pp. 111-119
Author(s):  
Evelyn Anabela Anisa ◽  
Rahmad Afriansya ◽  
Julian Randisyah ◽  
Pinta Astuti
Keyword(s):  
Fly Ash ◽  
Mix Design ◽  
Geopolymer Concrete ◽  
Self Compacting Concrete ◽  
Slump Flow

Beton merupakan suatu material yang banyak digunakan dalam dunia konstruksi. Namun, setiap produksi beton menimbulkan dampak buruk pada pemanasan global. Semen sebagai bahan pengikat beton dapat menyumbang emisi CO2 sebanyak 8% dalam setiap produksinya. Proses pengecoran pada beton juga dapat menghasilkan polusi suara akibat penggunaan alat vibrator. Para peneliti terus berupaya menghasilkan beton yang lebih ramah lingkungan. Self Compacting Geopolymer Concrete (SCGC) merupakan kombinasi baru antara beton geopolimer dan Self Compacting Concrete (SCC) yang masih terus diteliti dan dikembangkan hingga saat ini. SCGC merupakan beton ramah lingkungan karena tidak menggunakan semen portland sebagai bahan pengikatnya. Penggunaan beton SCGC tidak memerlukan vibrator karena memiliki sifat flowability yang baik. Penelitian ini menggunakan bahan pengikat berupa material pozzolan yang mengandung senyawa kimia berupa SiO2 dan Al2O3. Tahapan penelitian ini dilakukan dengan mencari metode curing dan mix design optimal dalam penyusunan SCGC. Pengujian XRF perlu dilakukan dalam penelitian ini untuk mengetahui kandungan senyawa kimia pada fly ash Tjiwi Kimia. Beberapa pengujian beton segar SCGC diperoleh hasil berupa slump flow 690 mm, T50 2,4 detik, v-funnel 8,35 mm, dan rasio l-box 0,84. Sifat mekanik beton diuji berdasarkan kuat tekan, kuat tarik belah, dan kuat lentur dengan hasil rata-rata sebesar 27,05 MPa, 6,32 MPa, 1,91 MPa.

Mix Design of Fly Ash Based Geopolymer Concrete

2015 ◽  
pp. 1619-1634 ◽  
Author(s):  
Subhash V. Patankar ◽  
Yuwaraj M. Ghugal ◽  
Sanjay S. Jamkar
Keyword(s):  
Fly Ash ◽  
Mix Design ◽  
Geopolymer Concrete

scholarly journals EFFECT OF CaO CONTENT ON GGBS BASED GEOPOLYMER CONCRETE

2019 ◽  
pp. 8-12
Author(s):  
D. S. Patare ◽  
P. A. Chavana ◽  
S. L. Hake
Keyword(s):  
Fly Ash ◽  
Alkaline Solution ◽  
Design Procedure ◽  
Heat Of Hydration ◽  
Engineering Industry ◽  
Polymerization Process ◽  
Alkaline Solutions ◽  
Strength Increase ◽  
Fine Aggregate ◽  
Geopolymer Concrete

GGBS based Geopolymer concrete is innovative composite material for civil engineering industry for which binding material cement and water is replaced bypozzolanic material like fly ash, GGBS and activated by highly alkaline solutions to act as a binder in the concrete. Mix design procedure used is proposed on the basis of quantity, fineness of fly ash, quantity of water, grading of fine aggregate, fine to total aggregate ratio and GGBS is used for M40 grade of GGBS based Geopolymer concrete. During experimental work, variation of different parameter like ratio of alkaline solution ratio (Na2SiO3/NaOH) of 2 was taken. Different molarities such as 12M and 16M of NaOH was taken. In addition, different percentage of such as 0%, 20%, 40%, 50% of GGBS with solution to fly ash ratio 0.38 and sodium silicate to sodium hydroxide ratio 2 was taken. The samples are cured in oven at 450C temperature for 24 hrs. The results show that the strength of geopolymer concrete increases with increase in percentage of GGBS in the mix. The strength increase up to 40% replacement of fly ash with GGBS after that it starts decreasing. In case of fly ash based geopolymer concrete as there is no CaO content so curing takes place due to polymerization process, but with the addition of GGBS in fly ash based geopolymer concrete curing is due to combine effect of polymerization as well as heat of hydration due to presence of alkaline solution and CaO respectively. As molarity of NaOH increases from 12M to 16M, compressive strength, flexural strength, split tensile strength also increases.

scholarly journals Effect of molarity of sodium hydroxide and molar ratio of alkaline activator solution on the strength development of geopolymer concrete

2021 ◽  
Vol 309 ◽  
pp. 01058
Author(s):  
V Srinivasa Reddy ◽  
Karnati Vamsi Krishna ◽  
M V Seshagiri Rao ◽  
S Shrihari
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Sodium Hydroxide ◽  
Ash Content ◽  
Mix Design ◽  
Molar Ratio ◽  
Strength Development ◽  
Geopolymer Concrete ◽  
Synergic Effect ◽  
Alkaline Activator

In the current study, effect of SiO2/Na2O ratio in Sodium silicate (Na2SiO3) solution, Na2SiO3/NaOH ratio and molarity of NaOH on the compressive strength of geopolymer concrete. A geopolymer mix design is formulated with various mixes are casted with alkali activator solution (AAS) / fly ash (FA) =0.5 and constant fly ash content. The molar ratio of SiO2/Na2O in Na2SiO3 solution is altered from 1.50 to 3.00 for different ratios of Na2SiO3/NaOH (2.0, 2.5 and 3.0) and also for various molarities of NaOH (8M,10M,12M,14M,16M and 18M) are studied for their synergic effect on the compressive strength of geopolymer concrete. Results highlighted that the 16M NaOH yields high compressive strength when SiO2/Na2O in Na2SiO3 solution is around 2.00 to 2.40 and Na2SiO3/NaOH=2.5.

Sign in / Sign up

Export Citation Format

Share Document