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Effect of unconfined compressive strength of rock on ...

Dec 02, 2020· UCS values considered in the present study represent the strength characteristics mainly of dolomite, shale, sandstone, granite, basalt and quartzite as surrounding medium of tunnel. The properties of these rock mediums are given in Table 1 .

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Compressive strength and durability of fly ash stabilized ...

Compressive strength and durability of fly ash stabilized dolomitic waste as a lightweight construction material Ikechukwu F. ANEKE 1 and Felix N. OKONTA Department of Civil Engineering science, University of Johannesburg, P.O Box 524,

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Alkali-activated dolomite and its outstanding mechanical ...

Jul 01, 2020· Alkali-activated dolomite (AD) was successfully prepared from dolomite powder by alkali activation via the process of compression molding at room temperature (22 °C). The AD put up excellent early strength and high strength properties: the 2-day and 28-day compressive strength of AD reached 58 MPa and 122 MPa respectively.

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Strength Development and Elemental Distribution of ...

Feb 24, 2020· Compressive strength of dolomite/fly ash geopolymer composites before and after fire exposure at 200, 400, 600, 800, 1000 °C. The strength of the DFA geopolymer increased as the temperature increased, attaining a peak strength of 74.48 MPa at 400 °C.

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Effect of Dolomite Limestone Powder on the Compressive ...

Jan 01, 2013· As we can see, partial cement replacement with dolomite limestone powder results in compression strength increasing. Strength of samples containing 25% of dolomite limestone powder increased by 16.7% and 23.5% at 14 and 28 days age, respectively, in comparison with …

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Effects of freeze-thawing cycles on the physical and ...

Feb 17, 2021· Furthermore, the uniaxial compression strength of basalt decreased by 16% at the end of the applied 50 F-T cycles. However, that of dolomite only decreased by 4.23% following the F-T cycles. A similar proportional decrease in the point-loading strength index of both rock samples was also induced: 26.12% for basalt and 23.09% for dolomite.

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Strength Characteristics for Limestone and Dolomite Rock ...

Limestone and Dolomite which comes under a category of soft to medium ... The Unconfined compressive strength and Compressive strength of microfine cement + 3% sodium silicate slurry is obtained by casting cylindrical cubes and 70*70mm square respectively in accordance with IS 9143:1979 and results are obtained which is

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Application of light-burnt dolomite as a mineral addition ...

The light-burnt dolomite (LBD) was used to prepare blended cements. The hydration, setting time and microstructure of the cement were assessed and the compressive strength and deformation of concrete made using the LBD cements were measured. The results showed that the blended cement had no unfavourable effects on setting time or hydration.

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of Dolomite Caprock under Triaxial Compression

Dec 11, 2020· and permeability of dolomite, and increased its triaxial compressive strength, but the addition of nitrogen reduced the compressive strength of dolomite by 10~30%, the higher the confining pressure, the smaller the di erence. Compared with the maximum permeability under 15 MPa,

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Effect of Dunaliella Salina Alga on Compressive Strength ...

Effect of Dunaliella Salina Alga on Compressive Strength of Concrete Fatma M. Taher1, Ahmed S. Faried2, Adel Abd EL-Tawab3, ... 3.2 That both are so that the mix becomes homogenous in both Crushed dolomite & Natural sand The properties of the crushed dolomite and sand used in this study are listed in Table (1).

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PHYSICAL PARAMETERS, TENSILE AND COMPRESSIVE …

physical parameters, tensile and compressive strength of dolomite rock samples: influence of grain size ali lakirouhani 1, farhad asemi 1, afshin zohdi 2, jurgis medzvieckas 3*, romualdas kliukas 4

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Geological and Geotechnical Assessment of Gabal Ataqa ...

The compressive strength of the rock core specimens was determined using a uniaxial compression testing according to the 16 [ ]. In this method, the stress was obtained from the recorded value of the axial load divided by the cross – sectional area of the specimen assuming that the deformation is homogeneous and no volume

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Effect of Dolomite Limestone Powder on the Compressive ...

Abstract The purpose of this work is to describe the effect of fine ground dolomite limestone on important physic and mechanical properties of concrete. The present examinations indicate that the use of dolomite limestone as component instead of limestone is a viable solution for producing Portland dolomite limestone cement, especially for quarries with dolomitic inclusions or overburden.

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EXPERIMENTAL INVESTIGATION OF GLASS FIBER REINFORCED ...

by dolomite silica by 50% and cement is replacement by fly ash by 30% the compressive strength increased by 21.35% than conventional concrete and split tensile strength results indicate that 24% increase in strength is achieved and flexural strength also …

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Some Useful Numbers

Water 0 m/sec (because no shear strength) Oil 0 m/sec (because no shear strength) Air 0 m/sec (because no shear strength) Limestone 3100 m/sec Sandstone 2400 m/sec Dolomite 3000 m/sec Shale 2600 m/sec Granite 3400-3600 m/sec Dolerite 3500-3600 m/sec Salt 2700 m/sec Resistivity Marble 5 x 107-109 Ohm-m Mica 1011-1014 Ohm-m

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(PDF) Estimation of rock engineering properties using ...

Relationship between rock strength and unit weight The relationship between tangent modulus at 50% Unconfined compressive strength of dolomite rock strain of failure and unconfined compressive strength was correlated with the dry unit weight as shown in was investigated, as shown in Fig. 13.

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Compressive Strength of Permeable Asphalt Pavement Using ...

This study focuses to examine the compressive strength and the stress strain relationship of permeable asphalt containing domato stone and BNA (Buton Natural Asphalt) Blend. Domato stone is a limestone containing quarzite dolomite that obtained from the coast of the Banggai island, Central Celebes. The test results shows that the stress strain ...

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THE EFFECT OF DOLOMITE AS LIGHTWEIGHT AGREGATE'S ...

dolomite as a replacement of sand. Then the compressive strength test is conducted. From these tests, it can be seen the influence of dolomite in the concrete mix and the percentage content of dolomite that can be used instead of sand. Keywords: compressive strength, dolomite, substitute for sand INTRODUCTION Dolomite is widely available in

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Materials | Free Full-Text | Strength Development and ...

Compressive strength of dolomite/fly ash geopolymer composites before and after fire exposure at 200, 400, 600, 800, 1000 °C. Table 1. Chemical composition of dolomite.

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Recycling the waste dolomite powder with excellent ...

Zarina et al. detected the addition of dolomite into boiler-ash-based geopolymer, at 1%-5% by weight, all reduced its 28-day compressive strength markedly; Yip et al. found that adding about 20% calcite or dolomite to metakaolin-based geopolymer helps to increase the compressive strength, although does cause additional contraction during the 90 ...

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Preparation of dolomite-based porous ceramics with Al2O3 ...

The influence of total corn flour content on the open porosity, compressive strength, and thermal conductivity of dolomite-based porous ceramics was investigated. In order to enhance the catalytic activity, dolomite-based porous ceramics were impregnated with an Al 2 …

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Failure of rock under tensile-compressive loading ...

Abstract. Failure data from compression and extension testing of Dunnville sandstone and Webatuck dolomite were analyzed using three different criteria: Mohr-Coulomb, Hoek-Brown, and Paul-Mohr-Coulomb. An emphasis was placed on the details of the failure criteria under tensile-compressive loading conditions, which was possible due to a dog-bone ...

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Study of using light-burned dolomite ores as raw material ...

Oct 17, 2018· The compressive strength of the MOS cement, which had been derived from light-burned dolomite by air curing for 1, 3, 7 and 28 d, was examined by a testing machine with the maximum load of 300 kN and a loading rate of 0·3 kN/s according to cement strength …

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Properties of Dolomite | Physical | Thermal

The hardness of Dolomite is 3.5-4 whereas its compressive strength is 140.00 N/mm 2. Streak is the color of rock when it is crushed or powdered. The streak of Dolomite is white whereas its fracture is conchoidal. Luster of Dolomite is the interaction of light with the surface of Dolomite. Luster of Dolomite is vitreous and pearly.

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Effect of nano-SiO2 (NS) on dolomite concrete towards ...

Aug 01, 2018· The compressive strength values of DC containing 0, 1, 2 and 4 wt.% NS are graphically represented in Fig. 2.The compressive strength increases with the NS up to 2 wt.% then decreases at 4 wt.%.A desired amount of NS has a good impact on the mechanical properties development, due to its high reactivity, whereas, the 4 wt.% NS leads to retardation of Portland …

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IMPACT OF QUARRY DUST & DOLOMITE POWDER ON …

compressive strength is computed after 7, 14 & 28 days curing. At 30% replacement, the compressive strength is found to be higher than the remaining proportions. Hence maintaining 30% of quarry dust, dolomite powder is incorporated to replace cement at 0%, 10%, 20%, 30%, 40% & 50% respectively.

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Replacement of Cement with Dolomite Powder: An ...

with dolomite powder 10% and sand with msand10%, when the Flexural strength is 3.84N/mm2. Athulya Sugathan (2017) Evaluated that the Compressive strength of Cubes are increased with addition of dolomite powder up to 15% replaced by weight of cement and further any addition of

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Effect of dolomite powder on the hydration and properties ...

compressive strength to Portland-limestone cement [1,2]. Moreover, similar to limestone, dolomite may be involved in hydration of cement, resulting in the formation of carboaluminates and the stabilization of ettringite. Besides, Mg released from dolomite is considered to interact with the cement aluminates to form hydrotalcite,

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Empirical relations between rock strength and physical ...

In this study, 31 empirical equations are summarized that relate unconfined compressive strength and internal friction angle of sedimentary rocks (sandstone, shale, and limestone and dolomite) to physical properties (such as velocity, modulus, and porosity).

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Reaction mechanism of dolomite powder in Portland-dolomite ...

Feb 08, 2021· Effect of the dolomite reaction on compressive strength. Samples cured at 20 °C showed a lower 3-day compressive strength for PDC than for PLC, regardless of replacement level. This effect might be associated with the lower accelerating effect of dolomite on the early hydration of cement compared to limestone, which produces fewer hydration ...

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(PDF) Strength Characteristics for Limestone and Dolomite ...

Cut Types of rock Millionite limestone With binding material c (N/mm 2 ) 7.3 5.8 3.2 0.9 Ф (˚) 26 30 33 34 E (N/mm 2 ) 1271.65 1195.48 696.82 632.80 Compressive strength (N/mm 2 ) 29.05 - - - Without binding material c (N/mm 2 ) - 4.9 2.8 0.4 Ф (˚) - 13 15 23 E (N/mm 2 ) - 757.52 747.76 421.53 Dolomite With binding material c (N/mm 2 ) 9 6 ...

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WORKABILITY AND COMPRESSIVE STRENGTH OF SELF …

A.Bradu et al. : Workability and compressive strength of SCC containing different levels… 19 Fig. 4. Effect of filler content on the compressive strength The following conclusions can be drawn from the results of this study: - The addition of limestone filler improves the properties of SCC in fresh state. - The filler effect on the hydration

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