scholarly journals Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

2018 ◽  
Vol 12 (4) ◽  
pp. 20-27 ◽  
Author(s):  
M.A Idris ◽  
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Carbonate Rocks ◽  
Physical And Mechanical Properties ◽  
Southern Nigeria

scholarly journals Lime based Dry Mixes with Carbonate Aggregates

2019 ◽  
Vol 8 (11) ◽  
pp. 3289-3292 ◽  
Keyword(s):  
Mechanical Properties ◽  
Quartz Sand ◽  
Carbonate Rocks ◽  
Physical And Mechanical Properties ◽  
Lime Mortar ◽  
Fine Aggregates ◽  
Lime Mortars ◽  
The Matrix ◽  
Optimal Values ◽  
Quarry Dust

The use of carbonate rocks as aggregates for cement concretes and mortars is limited due to their insufficient strength and the threat of corrosion. The use of quarry dust from crushing carbonate rocks are technically and economically feasible in building compositions based on air-hardening lime. The results of the study of the effect of replacing a part of quartz sand in lime mortar by limestone and dolomite fine aggregates on the basic physical and mechanical properties of lime mortars for restoration are presented in the paper. The matrix of planning experiments, which allows increasing the informativity of the research results in order to reduce the number of experiments in the search for optimal values, is proposed. The efficiency of replacement of the quartz sand with quarry dust of carbonate rocks in the production of dry mixes for restoration is shown.

Carbonate rocks as fillers in blended cements: Physical and mechanical properties

2020 ◽  
Vol 248 ◽  
pp. 118697
Author(s):  
Antonela Di Salvo Barsi ◽  
Guillermina Marchetti ◽  
Mónica A. Trezza ◽  
Edgardo F. Irassar
Keyword(s):  
Mechanical Properties ◽  
Carbonate Rocks ◽  
Physical And Mechanical Properties ◽  
Blended Cements

scholarly journals Assessment of Carbonate Rocks, Western Desert of Iraq as Dimension Stones for Building

2016 ◽  
Vol 2 (7) ◽  
Author(s):  
Salih Muhammad Awadh , Linaz Anis Fadhil
Keyword(s):  
Mechanical Properties ◽  
Carbonate Rocks ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Field Work ◽  
Western Desert ◽  
Modulus Of Rupture ◽  
American Standard ◽  
Western Desert Of Iraq ◽  
Physical And Chemical

The current study aimed to assess the Carbonate rocks as dimension stones for building. Carbonate rocks collected from the Mauddud Formation (Albian- Cenomanian), within the Western Desert of Iraq are studied petrographically, mineralogically and geochemically. Physical and mechanical properties of selected samples are found to assess their suitability as building stones. Field work is carried out and evaluated sampling of three sites of carbonate rocks. Petrography and mineralogy of these rocks are studied using polarized microscope and XRD technique.Three microfacies (peloidal wackstone-packstone, peloidal packstone and crystalline carbonate) are distinguished. Dolomitization, cementation and recrystallization are themain diagenetic processaffecting the physical and chemical properties of them. Dolomite is the predominant mineral in the 1M and 2M sites, whereas calcite is the most predominant mineral in the 3M site, so it is classified as limestone. Chemically samples are analyzedfor SiO2, Al2O3, CaO, MgO, Fe2O3, Na2O, K2O, TiO2, MnO and LOI. CaO and MgO are the most predominant oxides confirming the abundance of calcite and dolomiteso it is classified as a calcitic dolomite for 1M and 2M sites while classified as limestone for 3M site. The results of analysis physical and mechanical properties (bulk density, water absorption, compressive strength, modulus of rupture and abrasion resistance) are indicate that selected rocks are suitable as dimension stones for building according to American Standard for Testing Materials (ASTM) specification.

PERFORMANCE OF SAWDUST CONCRETE AT ELEVATED TEMPERATURE

2017 ◽  
Vol 80 (1) ◽  
Author(s):  
Ruhal Pervez Memon ◽  
Lemar Achekzai ◽  
Abdul Rahman Mohd. Sam ◽  
A. S. M. Abdul Awal ◽  
Uroosa Memon
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Fire Resistance ◽  
Lightweight Concrete ◽  
Physical And Mechanical Properties ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Waste Material ◽  
Lower Amount

The aim of this study was to shows the behavior of sawdust concrete at elevated temperature. Sawdust is considered as waste material but nowadays this waste material is utilized in the construction of the building as sawdust concrete. Sawdust is a by-product of wood which is generally used in the production of lightweight concrete, possessing low thermal conductivity. In this study sawdust concrete was made at three different proportions of cement and sawdust 1:1, 1:2, 1:3 by volume. At these proportions, the physical and mechanical properties such as density, workability, strength, fire resistance, mass loss, ultrasonic pulse velocity and residual strength were investigated after 28 days of curing. It was found that with the increment in the amount of sawdust, the workability and strength decreases, however in terms of fire resistance, concrete with lower amount of sawdust performed well. Considering the overall physical and mechanical properties, sawdust concrete can be used in building construction. 

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