scholarly journals OPTIMUM PERCENTAGE OF VOLCANIC TUFF IN CONCRETE PRODUCTION

2021 ◽  
Author(s):  
Mohmd Sarireh
Keyword(s):  
Volcanic Tuff ◽  
Concrete Production

Potentiality of Industrial Waste as Supplementary Cementitious Material in Concrete Production

2020 ◽  
Vol 11 (5) ◽  
pp. 214
Author(s):  
Sajjad Ali Mangi ◽  
Zubair Ahmed Memon ◽  
Shabir Hussain Khahro ◽  
Rizwan Ali Memon ◽  
Arshad Hussain Memon
Keyword(s):  
Industrial Waste ◽  
Cementitious Material ◽  
Supplementary Cementitious Material ◽  
Concrete Production

Increase of Efficiency of Operation of Autoclaved Gas Concrete Production by the Shock Technology at Egorievsky Building Materials Factory

2018 ◽  
Vol 759 (5) ◽  
pp. 16-19
Author(s):  
A.Yu. SMIRNOV ◽  
◽  
A.M. RUBLEV ◽  
A.A. BARANOV ◽  
M.V. AKULOVA ◽  
...  
Keyword(s):  
Building Materials ◽  
Concrete Production

Mirsid volcanic tuff, alkaline activation, dissolved species, optimum activation time, optimum activating concentration

2020 ◽  
Vol 71 (2) ◽  
pp. 196-201
Author(s):  
Erika Reisz ◽  
Corneliu-Mircea Davidescu ◽  
Radu Ardelean ◽  
Liviu Costea
Keyword(s):  
Sudden Increase ◽  
Activation Time ◽  
Volcanic Tuff ◽  
X Ray ◽  
Second Stage ◽  
Dissolved Species ◽  
Species Optimum ◽  
Potassium Magnesium ◽  
Exchange Properties ◽  
Activating Solution

The purpose of this article is to study the activation of the Mir�id volcanic tuff with NaOH solutions at various concentrations. To be more specific, the work investigated the evolution of the concentrations of species that passed from the tuff into the activating solutions and the quantities of dissolved species from 100 g tuff. The species found in the activating solution were: potassium, magnesium, aluminium and silicon. The shape of the curves - a sudden increase followed by a plateau or a second stage of slower increase - allowed for setting up the optimal activation time at a half-hour. Another finding was the optimal concentration of 1 N for the activating solution. X-ray diffractograms showed the increase of clinoptilolite content in the tuff, thus improving the adsorbent as well as ion exchange properties by activation with NaOH solutions.

scholarly journals Zeolite Tuff and Recycled Ceramic Sanitary Ware Aggregate in Production of Concrete

2019 ◽  
Vol 11 (6) ◽  
pp. 1782 ◽  
Author(s):  
Jacek Szulej ◽  
Paweł Ogrodnik ◽  
Beata Klimek
Keyword(s):  
Phase Composition ◽  
Bimodal Distribution ◽  
Sanitary Ware ◽  
Ceramic Ware ◽  
Sieve Analysis ◽  
Production Plant ◽  
Concrete Production ◽  
Aluminous Cement ◽  
Ceramic Sanitary Ware ◽  
The Impact

The article presents the results of research on the use of ceramic ware waste as aggregate in concrete production. Four concrete mixtures with aluminous cement were prepared, each with a different admixture of clinoptilolite. The only used aggregate was crushed waste ceramic sanitary ware obtained from a Polish sanitary fixture production plant. As part of the studies, a compressive test of cubic samples at different curing times ranging from 7 to 90 days was performed. Prior to the preparation of the samples, a sieve analysis and an elemental analysis of the obtained aggregate were conducted. In the framework of the testing, the bimodal distribution of clinoptilolite grains was determined, as well as its chemical composition. The conducted compressive tests demonstrated high strength of concrete containing ceramic aggregate and aluminous cement with an addition of clinoptilolite. In order to determine the impact that adding zeolite exerts on the phase composition and the structure of concrete samples, an analysis of the phase composition (XRD) and scanning electron microscopy examination (SEM) were performed. Furthermore, tests of abrasion, water penetration under pressure and frost resistance were conducted, determining particular properties of the designed mixtures. The abrasion tests have confirmed that the mixtures are highly abrasion-resistant and can be used as a topcoat concrete layer. The conducted tests of selected properties have confirmed the possibility of using waste ceramic cullet and a mineral addition of clinoptilolite in concrete production.

scholarly journals Copper Slag of Pyroxene Composition as a Partial Replacement of Natural Aggregate for Concrete Production

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 439
Author(s):  
Sandra Filipović ◽  
Olivera Đokić ◽  
Aleksandar Radević ◽  
Dimitrije Zakić
Keyword(s):  
Chloride Ion ◽  
Copper Slag ◽  
Partial Replacement ◽  
Copper Ore ◽  
Silicon Iron ◽  
Low Resistance ◽  
Natural Aggregate ◽  
Chloride Ion Penetration ◽  
Concrete Production ◽  
Technical Properties

Copper slag, a by-product of the pyrometallurgical process used for obtaining copper from copper ore in Bor, Serbia, contains mainly silicon, iron, calcium, and aluminium oxides. Due to such properties, it is disposed of in landfills. Despite the favourable technical properties copper slag aggregates possess, such as low-water absorption (WA24 0.6%), low resistance to fragmentation (LA 10%), and low resistance to wear (MDE 4%), its use in the construction industry is still limited. The results of testing the technical properties of copper slag aggregates (CSAs) as a potential replacement for natural river aggregate (RA) are presented in this paper. The experiments included tests on three concrete mixtures with partial replacement of coarse natural aggregate with copper slag. The replacement of RA particle sizes of 8/16 mm and 16/31.5 mm with CSA in the amount of 20% + 50% and 50% + 50% resulted in an increase in the compressive strength of 12.4% and 10.5%, respectively. The increase of CSA content led to a decrease in water penetration resistance and salt-frost resistance of concrete, whereas the resistance to chloride ion penetration did not change significantly.

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