##### Compressive strength of rocks - PetroWiki

Estimating compressive strength. General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C 0).Lithology is commonly derived during log analysis, so m may be estimated (Table 1).What is needed still is an initial measure of rock strength provided by C 0. C 0 can be estimated from porosity or …

اقرأ أكثر##### 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.

اقرأ أكثر##### Strength and durability assessment of concrete containing ...

The comparative analysis between the predicted compressive strength of both the model at 90 and 365 days were done in this study. Experimental compressive strength. The compressive strength test results of concrete containing dolomite quarry waste are shown in Fig. 8a. An increase in dolomite quarry waste caused a reduction in the compressive ...

اقرأ أكثر##### Correlation between Uniaxial Compressive Strength and ...

uniaxial compressive strength from the results of the point load test. 4. Test Results and Discussion 4.1 Uniaxial Compressive Strength Test Results The mean values of uniaxial compressive strength of the tested rocks are listed in Table 2. The strength values range from a low of 9.16 MPa for Marl to a high of 101.08 MPa for

اقرأ أكثر##### Bearing Capacity of Rocks - IIT Kanpur

In case of rock mass with favorable discontinuities, the net allowable bearing pressure may be estimated from: q a = q c * N j Where qWhere q c = average uniaxial compressive strength of rock coresaverage uniaxial compressive strength of rock cores N j = empirical coefficient depending on the spacing of the discontinuities 3+S/B 10 []1+300(δ/S) δ= …

اقرأ أكثر##### Strength Characteristics for Limestone and Dolomite …

Compressive Strength of U.C.S and Compression Test Compressive strength of binder material (microfine cement) 7 day(N/mm2) Sample no. U.C.S 70 X 70mm square cube With 3% sodium silicate Without sodium silicate With 3% sodium silicate Without sodium silicate 1 0.245 0.204 1.09 0.94 2 0.245 0.163 1.17 0.87 3 0.286 0.163 0.95 0.86 IV.

اقرأ أكثر##### REPLACEMENT OF CEMENT WITH DOLOMITE POWDER: …

Replacement of dolomite powder and m-sand is found to improve the strength of concrete. The target mean of M25 grade concrete is 31.6 N/mm2. The optimal replacement percentage of cement with dolomite powder 10% and sand with m-sand 10%, when the compressive strength is 36.55

اقرأ أكثر##### Workability and strength characteristics of self ...

Compressive strength The compressive strength of cubes at 7th, 28th and 90th days and 28th day cylinder compressive strength of the concrete mixes have been observed for different percent replacement of cement with fly ash and dolomite powder. From the results obtained, has been observed that the compressive strength of concrete

اقرأ أكثر##### Effect Of Dolomite Powder & Glass Fibre On Mechanical ...

• Compressive Strength Test: The compressive strength is measured in Compressive testing machine (CTM) with capacity of 3000kN. The compression strength is carried out on a cube specimen of the size 150x150x150mm of 42 concrete cubes 7 groups, 9 cubes for each of the blendes with different dosage of Dolomite along with controlled concrete as ...

اقرأ أكثر##### Rock Mechanics - University of Notre Dame

Compressive Strength!! Tensile strength = resistance to failure under tensile stress ! Typically much lower than compressive strength • 10% of compressive strength typical (Table 7.2) ! Horizontal rock beams can be dangerous because of the weak tensile strength – rock unit must be homogeneous and composed of resistant minerals

اقرأ أكثر##### 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 …

اقرأ أكثر##### STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES …

Mean tensile strength and compressive strength for selected sedimentary rock types (after Johnson and Degraff, 1988). The behavior of intact rock in the post-peak dom ain is not a true rock property and is partially dependent on the stiffness of the loading system. A testing machine consists of an assembly of

اقرأ أكثر##### Physical parameters, tensile and compressive strength of ...

The results showed that compressive strength and Young's modulus values were related to the dolomite percent, grain size, allochem percent, and carbonate percent.

اقرأ أكثر##### Effect of Dolomite Limestone Powder on the Compressive ...

Procedia Engineering 57 ( 2013 ) 775 â€" 780 1877-7058 2013 The Authors. Published by Elsevier Ltd. Selection and peer-review under responsibility of the Vilnius Gediminas Technical University doi: 10.1016/j.proeng.2013.04.098 11th International Conference on Modern Building Materials, Structures and Techniques, MBMST 2013 Effect of Dolomite Limestone …

اقرأ أكثر##### THE EFFECT OF DOLOMITE AS LIGHTWEIGHT …

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

اقرأ أكثر##### Multi-response optimization of hybrid fibre engineered ...

Although compressive strength was found to decrease as the dolomite content increases, the strength was considered to be satisfactory for structural applications. Mikhailova et al. [37] demonstrated that the addition of dolomite between 5 and 25% by weight of cement has positive effect on the compressive strength of concrete due to the growth ...

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

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 test standard methodology (GB 175-2007 ).

اقرأ أكثر##### Compressive Strength Of Dolomite

The chemical composition of dolomite and the compressive strength of dolomite geopolymer composites were studied. The both composites prepared with mechanical mixer manufactured by with rotor speed of 350 rpm and curing in the oven for 24 hours at 80C. XRF analysis showThe dolomite raw materials contain fewer amounts of Si and Al but high Ca in its …

اقرأ أكثر##### Effect of dolomite powder on the hydration and …

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,

اقرأ أكثر##### Physical and Mechanical Characterization of Himalayan …

The physical and static mechanical properties of dolomite e.g. density, specific gravity, static compressive strength and elastic modulus values are also determined. Petrological studies of dolomite are carried out through X-ray diffraction (XRD) test and scanning electron microscope (SEM) test. In the SHPB tests, it is observed from the stress ...

اقرأ أكثر##### 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).

اقرأ أكثر##### Compressive strength and elastic properties of a ...

Geophysical Prospecting, 2013, 61, 315–328 doi: 10.1111/1365-2478.12031 Compressive strength and elastic properties of a transversely isotropic calcareous mudstone Douglas Miller1,∗ Richard Plumb2 and Gregory Boitnott3 1Miller Applied Science LLC and MIT Department of Earth, Atmospheric and Planetary Sciences, 2Plumb Geomechanics LLC and …

اقرأ أكثر##### Predicting Unconfined Compressive Strength of Intact …

Unconfined compressive strength specimens. However, preparing fresh cores is not always possible, especially during the Adaptive neuro-fuzzy inference system Genetic algorithm Particle swarm optimization. Abstract Bedrock unconfined compressive strength (UCS) is a key parameter in designing the

اقرأ أكثر##### Chemical composition and strength of dolomite …

The chemical composition of dolomite and the compressive strength of dolomite geopolymer composites were studied. The both composites prepared with mechanical mixer manufactured by with rotor speed of 350 rpm and curing in the oven for 24 hours at 80˚C. XRF analysis showThe dolomite raw materials contain fewer amounts of Si and Al but high Ca in its composition.

اقرأ أكثر##### Strength Development and Elemental Distribution of ...

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. At this stage, dolomite, which contains a high Ca content, promoted the optimum reaction to ...

اقرأ أكثر##### Effect of Dolomite Limestone Powder on the …

compressive strength increasing (Fig. 5), and, at the same time, density increasing, see Fig. 6. Fig. 6. Effect of dolomite limestone fine powder (specific surface 5500cm2/g) content on modified concrete density 3.2. Microstructure In order to investigate filler influence, microstructure was examined with the help of scanning electrone microscope

اقرأ أكثر