A Mass of disturbed soil for testing
1 The minimum masses of disturbed soil required for testing are summarised in Table A.4.1. Where the minimum mass depends on the size of the largest particles present in significant quantity, this is related to the minimum mass required for sieving denoted by MMS which is given below Table A.4.1. 2 The required mass listed in Table A.4.1 allows for the preparation of one test specimen, with some allowance for wastage but not for the inclusion of over-size particles. When only the fine fraction...
stratum Classification tests for projects of Geotechnical Category
Loss on ignition for organic and clay soils
A Point load test A Test procedures
1 For the recommended method to be used see Annex B.15.3. 2 The test can be run with portable equipment or using a laboratory testing machine, and may be conducted either in the field or in the laboratory. 3 Rock specimens in the form of either core the diametrical and axial tests , cut blocks the block test , or irregular lumps the irregular lump test may be used for testing provided the reference e.g. ISRM specifications of shape and dimensions are followed.
A Direct shear test A Test procedures
1 The example listed in Annex B.15 should be followed. Some amendments have been introduced based on the recommendations of the SPRINT Rpt 216 project Quality Assurance in Geotechnical Testing. 2 The following amendments should be made to the ISRM procedure - The testing machine should have a travel greater than the amount of dilatation or consolidation expected, and should be able of maintaining normal load to within 2 of a selected value throughout the test. Dilation should be measured...
A Pinhole test
1 Examples of how to perform tests for the Pinhole test can be found in the documents listed in Annex B. In case these examples are followed, the following points sould be considered. It is recommended to follow the literature listed in Annex B, except that - the specimen should be compacted in a Harvard miniature mould at a water content close to the plastic limit, - five layers should be used for the total specimen height of 38 2 mm, - a constant compaction effort on each layer should be...
A Remoulded test specimen
1 Remoulding can be achieved by sealing the soil in a plastic bag where it is squeezed and kneaded with the fingers for several minutes. A remoulded test specimen is formed by working the soil into the appropriate mould, e.g. by using a tamping rod. This operation should be carried out as quickly as possible to avoid change of water content, and without entrapping air. The specimen should then be extruded and trimmed by the appropriate method given in A.4.3. A.4.5 Preparation of reconstituted...
A Test Procedures Pnv
1 Procedures for determination of chloride content include - Mohr's method for water-soluble chlorides, - Volhard's method for acid-soluble or water-soluble chlorides, 2 The first two methods make use of the exchange reaction between the chlorides and silver nitrate, but different methods of analysis are used. Both methods require careful observation and weighing. The third method is based on the measurement of conductivity in dilutions of the sample with known water content. 3 The presence of...
A GENERAL A Scope
1 This informative annex provides additional information for most of the aspects treated in the main text. 2 A.2 presents details on the requirements applicable to all laboratory tests. 3 In Annex B a bibliography is presented giving a list of standards that give examples of each laboratory test. The following list gives an overview of the subsection numbers and the tests treated in this annex. Annex A and Annex B have the same numeration system as the main text A.4 Preparation of soil...
A Recompaction of test specimen
1 For the preparation of small test specimens for direct shear, oedometer or compressive strength, the soil should be tamped, kneaded or compacted into the appropriate mould, ring or tube. A suitable hand rammer, or the Harvard compaction apparatus, or a kneading action, may be used. Care should be taken to avoid the formation of cavities within the specimen. The exact procedure required to obtain the desired density or compactive effort should first be determined by trial. Details should be...