1 OUR AFRISAM 's commitment to superior performance gives customers the peace QUALITY of mind that comes with guaranteed technical excellence, top QUALITY products, AFRISAM AGGREGATE . PROMISE sustainability and continuous innovation. AFRISAM Customer Service PO Box 6367. Weltevredenpark 1715. South Africa Phone: 0860 141 141. email: Building our Future Together 9/04/2014. With the planet as one of our core values, we assess the carbon footprint of each and every one of our operations and products while actively striving to drive down our impact on the environment. AFRISAM AGGREGATE Ballast AFRISAM has been producing building materials since 1934.
2 Today, detail regarding the influence of various characteristics and Ballast is AGGREGATE material used as the foundation in the construction of rail tracks and is usually made from crushed stone. we are a leading supplier of QUALITY construction materials and properties is required. It is packed between, below and around the rail sleepers or ties, and serves a number of purposes. technical solutions. Over the years, we have built up significant These include: These include: expertise. Facilitating drainage of water around the tracks. Apparent relative density. Our AGGREGATE division supplies AGGREGATE material to Gauteng, Bearing and transmitting the load from the railroad ties.
3 Water absorption. Mpumalanga, KwaZulu-Natal and the Western Cape. Our coarse AGGREGATE Crushing Value (ACV) and 10% Fine AGGREGATE Providing uniform support. AGGREGATE and crusher sands are processed from a wide range of geological rock types, while our sands may be from natural sources Crushing Test (FACT). Anchoring the track. such as pit or river sand, or may be produced by crushing and Polished Stone Value (PSV) and Los Angeles Abrasion. Preventing vegetation growth. screening of AGGREGATE material. QUALITY . Resisting AGGREGATE degradation. As members of the AGGREGATE & Sand Producers Association Physical properties.
4 Facilitating maintenance operations. of Southern Africa (ASPASA), our plants are subject to regular Grading limits. Resisting fouling. inspection. We are fully committed to complying with relevant statutory and regulatory requirements, as well as our own stringent Fine content. Minimising climatic influences. Environmental, Health and Safety and BBBEE policies. Dust content. Features of ballast: Flakiness index. Factors to consider when selecting Drainable. Geological properties. an AGGREGATE source: Stable. Skid resistance. Depending on the geological rock type found in the area, the Strong and hard wearing.
5 Cost. AGGREGATE material from our quarries has different properties. Climate. Easy to clean. AFRISAM has the expertise to ensure the correct selection of aggregates in your region. In choosing the correct AGGREGATE Low flakiness index. product for the application, some information and technical Correct shape. Ballast has to meet certain requirements in order to satisfy the above criteria. Below is the compliance criteria as specified in Spoornet S406 for ballast. Spoornet S406 test requirements and limits Compliance criteria Grading SANS 1083. Flakiness Index <30%. Relative Density >2,5. Voids Content >40%. LA Abrasion <22%.
6 Plasticity Index <6. Mill Abrasion <7%. Soundness <5%. Page 1 Page 2. Concrete AGGREGATE Road layer works material Concrete AGGREGATE is a broad term referring to the use of coarse Materials specifications: Base and sub-base materials are those materials that provide Soluble salt requirements: material such as sand, gravel, crushed stone and recycled concrete the supporting structure in any pavement design. When batching concrete, one should ensure that the AGGREGATE Colto requirements recommend the following on site: used in the manufacture of concrete. Essentially, AGGREGATE The table below provides G1 to G7 classifications.
7 Does not contain any deleterious material as this can have a For quartzite, tillite, shale and G1 to G4 materials, measure the materials make up a large portion of the total volume of concrete negative effect on the mix. soluble salts against pH or electrical conductivity. and serve to enhance its overall strength. Requirements for approved target grading: One should also be aware of the water demand of the fine Use the material if the pH is >10 after treatment at the crushing AFRISAM Concrete AGGREGATE materials vary in composition from AGGREGATE as this is very important in ensuring the control of SANS 1200-M and Colto requirements state that the AGGREGATE plant, and subsequently remains = 8,0.
8 One area to another depending on the type of parent rock or cement content in the mix. for bases and sub-bases should be derived from hard, sound and If the pH is <6,0 treat with lime until the pH = 10,0 before use. source. As such, it is important to consider all technical elements durable rock. when starting on a project. For natural gravel and other crushed AGGREGATE , use the material Quick guide to stone sizes for different Approved target gradings are determined by laying a trial section if the electrical conductivity (EC) is 0,15 Sm , but pay particular concrete applications: using material complying with grading limits given in the table Factors to consider when choosing AGGREGATE for attention to design and construction if the pH = 6,0.
9 Use in concrete: below. Prior to compaction, six samples of the material in situ If the pH = 6,0, the EC is 0,02 Sm and sulphates are not are taken and subjected to grading analysis. The resultant AGGREGATE type. Foundations a problem, use the material. If not, analyse the material in (smoothed) grading curve is then classified as the approved 26,5mm Deep suspended slabs accordance with the customer's instructions and submit a Type of binder and cement characteristics such as gypsum or target grading for that project and all future grading results Industrial floors thicker than 120mm proposal for approval. alkali content.
10 Are evaluated against this target. Floors Where the salinity of water added for compaction causes the Total cementitious content. Note: Approved target gradings are not used by AFRISAM to Paths salinity of the material to increase, determine soluble salinity Water:cement ratio. 22 or 19mm produce product. Patios within 24 hours of compaction before prime coat is applied. Degree of hydration or cementing reaction. Driveways Hardness: Thin suspended slabs Total water content in the fresh concrete. Precast lintels, flagstones, bricks and blocks The hardness and particle shape of AGGREGATE used in road layer 13,2 or 9,5mm Environment and exposure conditions of the concrete.