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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Geotechnical Characterization Geotechnical characterization of the expansive soil under study was made such as gradation test, according to ASTM D standard [ 18 ].
The authors declare that there is no conflict of interests regarding the publication of this paper. Indeed, at that percentage there is little or nil variation of the liquid limit and the plastic index, even increasing the CaOH content.
Results astk these tests were the determination of the maximum dried density and the optimum moisture.
Specimen trimmer if undisturbed sample is tested. Mohr Circle for stress In 2D space e.
Dry and crumbly soils, fissured or varved materials, silts, peats, and sands cannot be tested with this method to obtain valid unconfined compression strength values. These pieces were tested by accelerated abrasion and considered ideal for its use as low-cost material for shelters [ 12 ].
Then, test specimens with these densities were made and subjected to unconfined compressive tests. Registration Forgot your password? The specific energy of soil compaction is the compaction effort applied to the soil per unit volume and is determined using the weight, height of drop, and number of blows of a hammer to compact a volume of soil placed in layers into a mold.
The objective of this study is to use this trash expansive soil via a composite material, soil-CaOH, to produce bricks of optimal and controlled compaction energy for masonry, which is neglected in the production of this kind of bricks.
Our results show that two optimal compaction energies can be considered with respect to the variation of optimum moisture in masonry bricks of expansive soil stabilized with lime. Therefore additional soil dispersions generate increase of water content.
qstm If you wish to download it, please recommend it to your friends in any social system. Rupture stress and fracture stress of the proposed brick and some commercial products. Abstract In general, bricks frequently show different densities and therefore different resistances because the compaction energy is awtm considered in their production.
These pieces are preferred because of their cultural reasons, accessibility, and long history. By gradation analysis, via dry and humid, it was determined that the soil was a material with fines, since Soil compaction produces an increase in resistance and decreased deformability.
These were compared with commercial pieces for masonry, tested under the same norm. Geotechnical characterization of the expansive soil under study was made such as gradation x2166, according to ASTM D standard [ 18 ]. To make this website work, we log user data and share it with processors. These soils are mainly of the expansive type and show volumetric instability due to humidity variations.
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 ].
With this procedure, sustainable bricks of high and homogeneous resistance can be obtained.
Higher compaction energy values do not improve density. Figure 2 shows that the increase in density causes increases in resistance. To determine these values, test specimens were prepared with dimensions: Red clay is a trash subproduct from the aluminum extraction.
In general, bricks frequently show different densities and therefore different resistances because the compaction energy is not considered in their production.
The compacting procedure for the stabilized soil was compaction by layers with a weight falling from a controlled height Proctor compaction procedure.
Auth with social network: It should be pointed out that the modified soils tests specimens had the optimal amount of Astmm, previously determined.
The increase in density causes increases in resistance.
0 presentations Profile Feedback Log out. Values for maximum dry density and optimum moisture content for the above conditions are shown in Table 1.
Link to Active This link will always route to the current Active version of the standard. Stabilized-soils tests specimens were prepared and subjected to unconfined compression, following the ASTM D standard [ 25 ].
Moreover, the soil classification changes from CH high compressibility clay to ML lime of low plasticity ; thus, it has properties of a low plasticity soil, that is, little or nil volumetric change. From the gradation via humid analysis, the percentage of particles less than 0. While their properties are well known with respect to their characteristics of initial performance, there has been little research about their durability in the long term and the deterioration due to long exposition of environmental factors [ 15 ].
In general, bricks frequently show different densities and therefore different resistances because the compaction d266 is neglected in the production of this kind of bricks. With this data and the plasticity index, the activity index of the clay was determined as 4.