Search Results - "Yankwa Djobo, Jean Noel"
-
1
Mechanical properties and durability of volcanic ash based geopolymer mortars
Published in Construction & building materials (15-10-2016)“…•Volcanic ash based geopolymer mortars perform well under wet-dry cycles.•Samples cured at 27°C have better acid resistance than those cured at 80°C.•The…”
Get full text
Journal Article -
2
Volcanic ash-based geopolymer cements/concretes: the current state of the art and perspectives
Published in Environmental science and pollution research international (01-02-2017)“…The progress achieved with the use of volcanic ash for geopolymer synthesis has been critically reviewed in this paper. This consists of an overview of…”
Get full text
Journal Article -
3
The role of chemistry and fineness of metakaolin on the fresh properties and heat resistance of blended fly ash-based geopolymer
Published in SN applied sciences (01-05-2023)“…Sensible thermal energy storage using concrete as a storage medium is a promising technology that helps minimize energy in power plant. The purpose of this…”
Get full text
Journal Article -
4
The reaction of calcium during the formation of metakaolin phosphate geopolymer binder
Published in Cement and concrete research (01-08-2022)“…This work reports the role of calcium during the acidic aluminum phosphate-activation of metakaolin (MK) and the characteristics of the resulting binder…”
Get full text
Journal Article -
5
Natural pozzolan based geopolymers: A review on mechanical, microstructural and durability characteristics
Published in Construction & building materials (30-11-2018)“…•Use of natural pozzolans in development of geopolymers.•Properties of natural pozzolan based geopolymers.•Factors influencing the geopolymerization of natural…”
Get full text
Journal Article -
6
Lateritic soils based geopolymer materials: A review
Published in Construction & building materials (15-08-2022)“…[Display omitted] •Use of lateritic soils in the development of geopolymer products.•Advances in the mechanism of laterite based geopolymer were…”
Get full text
Journal Article -
7
Control of the setting reaction and strength development of slag-blended volcanic ash-based phosphate geopolymer with the addition of boric acid
Published in Journal of the Australian Ceramic Society (01-09-2021)“…This work aimed to evaluate the role of the addition of blast furnace slag for the formation of reaction products and the strength development of volcanic…”
Get full text
Journal Article -
8
Preparation of acid aluminum phosphate solutions for metakaolin phosphate geopolymer binder
Published in RSC advances (30-09-2021)“…This work assessed the potential of synthetic acid aluminum phosphate solutions for the enhancement of the characteristics of metakaolin phosphate geopolymer…”
Get full text
Journal Article -
9
Setting and hardening behavior of volcanic ash phosphate cement
Published in Journal of Building Engineering (01-09-2020)“…This study aims at determining the setting and hardening behavior of volcanic ash-phosphate cement (VAPC) at room temperature using various concentrations of…”
Get full text
Journal Article -
10
Gel Composition and Strength Properties of Alkali-Activated Oyster Shell-Volcanic Ash: Effect of Synthesis Conditions
Published in Journal of the American Ceramic Society (01-09-2016)“…The gel composition and mechanical properties of alkali‐activated oyster shell‐volcanic ash were investigated at different NaOH concentrations (8, 12, and 15M)…”
Get full text
Journal Article -
11
Microstructural characterization and mechanical properties of bottom ash mortar
Published in Journal of cleaner production (01-01-2018)“…Coal Bottom Ash (CBA) is one of the widely-produced residues of coal incineration in thermal power plants. The annual extraction of such a huge amount of waste…”
Get full text
Journal Article -
12
Reactivity of volcanic ash in alkaline medium, microstructural and strength characteristics of resulting geopolymers under different synthesis conditions
Published in Journal of materials science (01-11-2016)“…The present paper investigated the reactivity of volcanic ash in alkaline medium and reported the effect of synthesis conditions on microstructural and…”
Get full text
Journal Article -
13
Utilization of sodium waterglass from sugar cane bagasse ash as a new alternative hardener for producing metakaolin-based geopolymer cement
Published in Chemie der Erde (01-05-2017)“…Sugar cane bagasse ash from SOSUCAM company in Cameroon was used to synthesize sodium waterglass as a new alternative hardener. The new hardener was used to…”
Get full text
Journal Article -
14
Physical and mechanical properties of unheated and heated kaolin based-geopolymers with partial replacement of aluminium hydroxide
Published in Materials chemistry and physics (01-01-2020)“…Amorphous aluminium hydroxide and aluminium oxy-hydroxide were used as replacements in the synthesis of kaolin based-geopolymers. Physical and mechanical…”
Get full text
Journal Article -
15
Particles size and distribution on the improvement of the mechanical performance of high strength solid solution based inorganic polymer composites: A microstructural approach
Published in Materials chemistry and physics (15-07-2021)“…This research reports on the influence of particle size and distribution on the physical, mechanical and microstructural features of solid solutions…”
Get full text
Journal Article -
16
A comparative study of two methods to produce geopolymer composites from volcanic scoria and the role of structural water contained in the volcanic scoria on its reactivity
Published in Ceramics international (01-12-2015)“…Volcanic scoria (ZG, ZK) and kaolin (MY38) were applied for producing geopolymer mortars using two methods such as fusion and conventional methods. Kaolin was…”
Get full text
Journal Article -
17
Size fractionation of brown fly ash: utilisation of grey fraction as a pozzolanic material in blended cement
Published in European journal of environmental and civil engineering (11-05-2020)“…The work aimed to classify a raw brown colour fly ash (RFA) into coarse grey fly ash (GFA) and fine brown fly ash (BFA) using a laboratory air classifier and…”
Get full text
Journal Article -
18
Investigation of Groundnut Shell Powder on Development of Lightweight Metakaolin Based Geopolymer Composite: Mechanical and Microstructural Properties
Published in SILICON (2022)“…The aim of the present project deals with the use of the available agricultural by-product groundnut shell ash (GSA) as replacement (0, 10, 20 and 30 wt.%) to…”
Get full text
Journal Article -
19
Early age properties and water resistance of calcium hydroxide modified volcanic ash‐based phosphate geopolymer binders
Published in International journal of ceramic engineering & science (01-11-2023)“…Abstract This work aims to improve the early age characteristics and water resistance of volcanic ash‐based phosphate geopolymer materials by modifying the…”
Get full text
Journal Article -
20
Effective Stabilization of Cadmium and Copper in Iron-Rich Laterite-Based Geopolymers and Influence on Physical Properties
Published in Materials (12-12-2023)“…This study aimed to investigate the efficiency of a geopolymer binder of the type of Na-poly(ferro-silico-aluminate) as a matrix for the stabilization of heavy…”
Get full text
Journal Article