ASTM D2166 00 PDF
Download Citation on ResearchGate | On Jan 1, , ASTM and others published D standard test method for unconfined compressive strength of. definitions of terms. 1 This test method is under the jurisdiction of ASTM Committee D18 on Soil and Last previous edition approved in as D – 00e1. Page 1. ASTM D Unconfined Compressive Strength. Page 2. Page 3.
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This technique is conventional for improving expansive soils properties [ 4 ]. A generalized solution has been to extract them and substitute them by inert soil; thus they become construction trash.
We also conclude that high compaction energy does not improve density values. Results of these tests were the determination of the maximum dried density and the optimum moisture.
Mohr Circle for stress In 2D space e. Tests and Experimental Methods 3.
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However, the low quality control of manufacturing of these pieces leads to strength variations, dimensions, and density. Thereafter, masonry bricks were subjected to tests of stress rupture and strength to first fissure. The liquid limit was In this respect, there have been efforts for producing these bricks with fly ashes 0 a small percentage of CaOH.
Indexed in Science Citation Index Expanded. The values stated in inch-pound units are approximate. Many countries in the world have to deal with the problem of expansive clays vertisols such as Mexico, the USA, Australia, South Africa, India, and Israel among others.
The first is when the optimal humidity reaches its smallest value integrated soil lumps and the second is when humidity increases disintegrated soil lumpsafter reaching its lowest value. In general, bricks frequently show different densities and therefore different resistances because the compaction energy is neglected in the production of this kind of bricks. Strength of Materials CVE This process is obtained with suitable techniques applied on the soil, which improves the dry specific weight decreasing its empty spaces.
From Table 2it can be observed that the best results for the proposed brick under study were obtained at ast, days. Background The applications of the use of soils treated with CaOH are, for example, in the construction of bed-layers of pavements, in the stabilization of dams made of earth, and as a layer for supporting shallow foundations [ 3 ]. Unconfined Compressive Strength Test specimens of modified soils were subjected to unconfined compression [ 25 ] at different ages 7, 14, 30, and 60 days and the compaction energies mentioned above.
Since fifty years ago, the introduction of blocks asym of compressed earth was seen as an important step.
The applications of the use of soils treated with CaOH are, for example, in the construction of bed-layers of pavements, in the stabilization of 000 made of earth, and as a layer for supporting shallow foundations [ 3 ].
Link to Active This link will always route to the current Active version of the standard. View at Google Scholar 000. If you wish to download it, please recommend it to your friends in any social system.
The compaction energy was selected to dd2166 the best reasonable strength. Balance, sensitive to 0. Results are plotted in Figure 2. Soil compaction produces an increase in resistance and decreased deformability. Compaction properties and unconfined compressive strength at different ages. Auth with social network: Registration Forgot your password?
The constant growing of human settlements has provoked the urban stain to be extended up to agricultural lands, thus forcing to build on top of them. Therefore, there are two main factors that determine the best density of soil material: S — Soil Mechanic. This energy causes a small final increase ast, its density.
Geotechnical Lab – Department of Civil and Construction Engineering | KSU
Remolding device if remolded sample is tested. Then, following the ASTM standard [ 19 ], the liquid and plastic limits were determined, as well as the shrinkage limit [ 20 ].
For stabilization of expansive clay, three different doses of CaOH, astk, 6, 8, and 10 percent of its dry weight, were aggregated to astk sample.
Several test specimens of soil added with CaOH with different percentages in dry weight were prepared. In addition the mechanical properties of the composite increase with time.
The authors declare that there is no conflict of interests regarding the publication of this paper. It is beyond the scope of this test method to consider significant digits used in analysis methods for engineering design. Using the activity criteria the soil has a highly expansive potential [ 2 ]. Rupture stress and fracture stress of the proposed brick wstm some commercial products. Pores size diminishes with the increase of cement content in the block [ 14 ].
Then, they were subjected to tests for determining the break modulus and the strength to first fissure [ 26 ] for comparison with commercial bricks.