Concrete is 516 1959 methods is 2386 methods

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Unformatted text preview: )-I963 Measuring mortar making properties of fine aggregate -# Since withdrawn 13 IS : 383 - 1970 ( Part VII)-1963 (Part Alkali aggregate VIII)-1963 Petrographic 1s : 2405-1963 Wire cloth and perforated IS : 2430-1969 Methods for sampling reactivity examination plates for industrial of aggregates APPENDIX ( Clause A-l. 1 ) sieves for concrete C DESCRIPTION AND PHYSICAL CHARACTERISTICS AGGREGATES FOR CONCRETE OF c-1. GENERAL HEADINGS 01.1 To enable detailed reports on aggregates to he framed on a comparable basis, the following general headings under which the appropriate information may be given are suggested as a guide: example, granite, limestone and sandstone a) Trade Group -For (JCC-c-2.1); b) Petrological .Name and Description -The correct petrological name should be used and should be accompanied by a brief description of such properties as hardness, colour, grain, imperfections, etc; that is, freedom c) Description of the Bulk- The degree of cleanliness, from dust, should be stated and reference made to the presence of any pieces not representative of the bulk, such as elongated or flaky pieces; d) Particle Shaps - See C-3; and e) &fiace T+4reSee C-3. 02. NOh8ENCLATURE OF ROCK G2.0 The technical nomenclature of rocks is an extensive one and for practical purposes it is sufficient to group together with those rocks having certain petrological characteristics in common. Accordingly, the list of trade groups given in G2.1 is adopted for the convenience of producers and users of stone; C-2.1 Trade Groups of Rocks Used as Concrete Names of trade groups : Aggregate Granite, Gabbro, Aplite, Dolerite, Rhyolite, Basalt, Sandstone, Limestone, Granulite, Gneiss, Schist and Marble 14 . IS : 393 - 1970 C-2.1.1 List of Rockr Placed Una’er the Approjwiate Trradt Grouts-The correct identification of a rock and its placing under the appropriate trade group shall be left to the decision of the Geological Survey of India or any competent geologist. IGNEOUS ROCKS Granite Group Granodiorite Diorite Syenite Granite Gmnophyre Gabbro Group Peridotite Pyroxenite Epidiorite Gabbro Norite Anorthosite Aplitc Group Quartz Aplite Porphyry reef Dolerite Group Lamprophyre Dolerite Rhyolite Group Felsite Pumicite Rhyolite Trachyte Basalt Group Basalt Andesite SEDIMENTARY ROCKS Sands:ove Croup Arkose Gray wacke Grit Sandstone Quartzite Limestone Group Dolomite Limestone METAMORPHIC ROCKS Granulite and Gneiss Grou& Amphibolite Granulite Granite gneiss Composite gneiss Schist Group Phyllite Schist Slate Marble [email protected] Crystalline Limestone iMarble 15 IS:383-1970 C-3. PARTICLE SHAPE AND SURFACE TEXTURE C-3.1 The external characteristics of any mixture of mineral aggregate III include a wide variety of physical shape, colour and surface condition. it may be convenient to apply to order to avoid lengthy descriptipns, distinctive group types of aggregates some general term which could be adopted. C-3.2 The simple system shown in Tables 6 and 7 has, therefore, been devised and is put forward in the ho...
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