Grade 8 Physical Science ENG/AFR

 

Features

Matter and Materials

Energy and Electricity

Gases

Acids and Basis

Density

5 Quizzes

12 Exam Papers + Memo's

Optional - Workbook (Activities & Homework)

Fully Animated Theory, Video's, Quizzes and Exam Papers on 1 CD.

Acids and Basis

Consists of 21 pages. We look at the properties of acids and basis, Alkali's, Neutralization of a base with an acid, acid rain and more!

Gasses

Consists of 25 pages. With the help of description, animation and illustrations, Preparing O2 and collecting it, Physical properties of the Ozone, Uses of hydrogen, properties of hydrogen and collecting it , and more has been made easier!

Matter and Materials

Consists of 23 pages. Properties of solids, liquids and gasses. More about the Periodic Table and the a brief history about it. Physical and Chemical changes the "Liebig Condenser" and more!

Energy and Electricity

 

In these 36 pages, we look at Potential energy and Kenetic energy, electricity in South Africa, saving electricity, energy transfer, types of circuits, static electricity, connection of cells, connection of resistors and allot more!

 

 

 

 

Scimat Interactive Learning cc • Developed by Code Play Studios • 2011

 

A raft foundation is a reinforced steel and concrete foundation. The NHBRC requires the construction of raft foundations on certain ground classifications such as clay, dolomite, turf or collapsible soil. Raft foundations are also utilized on ground conditions not specifically requiring a raft, as the turnaround time on construction thereof is shorter than that of a conventional foundation and less logistical planning is required from the client.

Raft Foundations CC specializes in the design and supply of raft foundations. Our services include earthworks and land surveying, as well as engineered layouts on each project. Earthworks consist of leveling and compaction of the stand (1000mm bordering foot print of ground floor). Construction of a raft foundation consists of ground beam excavations, steel reinforcement, formwork, 250 micron SABS plastic and 20 Mpa concrete (unless specified otherwise).
We have grown to become one of the most trusted and reliable in our field. Our company mostly focuses on Raft Foundations and concrete Slabs. We are based in Pretoria, but do work all over the Gauteng area. Our team is passionate about what they do and this can be seen in the quality of work. We also pride our self in being the most cost effective in the business!!

Raft Foundations (Floating foundations) is used when soil conditions like dolomite, clay and collapsible soils are encountered. These foundations consist of a solid slab of heavily reinforced concrete covering the entire building footprint area. This ensures that the building doesn't get damage when the soil falls away or moves under the building.

Raft Foundations have become the preferred foundation method. Due to the fact that it is fast and easy to construct, stable foundation and cost effective.
Raft Foundations CC is a civil engineering construction company specializing in the construction of raft foundations. In conjunction with professional Consulting Engineers we provide a complete design and construction service for raft foundations.
A raft foundation is essentially a reinforced concrete slab on the ground foundation designed for the specific soil conditions on the stand.
Raft foundations are mainly used when problematic soil conditions are encountered such as dolomite soils (sinkholes), heaving soils (clay) and collapsible soils (sand). Due to the speed and accuracy with which raft foundations can be constructed it has become the preferred foundation method for large housing projects even on normal soil conditions.
Raft Foundations
A raft foundation is a reinforced slab in the correct position on the ground which allows the foundation to move (or ‘float’ – hence the alternate name ‘floating foundation’) along with subtle ground movement avoiding damage (e.g. cracks in walls).
Raft foundations have always specifically been used in areas where the ground is inherently volatile and prone to ground movement, such as dolomite and clay. The alternate would be to dig deep foundations to avoid the effects of ground movement. However, raft foundations are often being used as a replacement for deep strip foundations as they often prove more cost effective with more advantages.
We do the setting out of the shutters for the raft foundation, ensuring that it is level and square. Thereafter we fill the shutters to the desired height and compact the fill to the required standard. Thereafter we trench the beams according to specifications. The residual soil is then removed, the levels again checked and squares tested. In the meantime, our team of steel binders bind the steel according to the specifications provided. The 250micron plastic is then placed in the trenches and steel fixed inside the trenches. We also order the concrete and then liaise delivery times with the provider. Once again the levels and squares are checked and the foundations are then cast and screeded. A light hand float follows the screeding. The next morning we apply our powerfloat to the floor to provide the client with a completed floor. Engineer inspections are arranged by us prior to casting of the foundation. This ensures that our products are always according to specifications. We also order the steel for the raft foundations in advance, based on the anticipated production for a specified period.