| Cement is mixed to create concrete, which is | | | | machine useless. Never throw bricks into the |
| used for many purposes. It is one of the most | | | | mixer drum to clean it out. The best method is |
| widely used materials in the world, and is often | | | | using 19mm of gravel and clean water. |
| used to pave driveways, roads, sidewalks, | | | | Cement Mixing Formula |
| reinforce buildings and for various other uses in | | | | Volume |
| construction. Depending on the volume of cement | | | | Most concrete mixer brochures show the output |
| needed, there are certain techniques to adhere to | | | | in liters. (Example. 260 liters) and the amount of |
| in order to produce good concrete. | | | | concrete needed for the work at hand is usually |
| We take a look at some useful hints on cement | | | | measured in cubic meters. One cubic meter of |
| mixing using a towing mixer | | | | concrete is equal to 1000 liters. Therefore, if your |
| First add approximately 12 liters of water, | | | | machine is rated at 260 liters output, it can |
| depending on the type of cement mix. Cement | | | | produce 0.26 cubic meters per mix. |
| should go in after some of the aggregate. Work | | | | Production |
| consistently to the ratio of ingredients for | | | | The mixing cycle is the time it takes to fill the |
| whatever type of concrete mix you are working | | | | machine, mix the concrete and discharge it. Most |
| with. Beware of low grade aggregates, as this | | | | brochures for concrete mixers show a mixing |
| only leads to trouble later on with sinking, spoiling | | | | cycle of 2 to 3 minutes. This is not an accurate |
| the appearance of the cement once you have | | | | figure for all practical purposes. When using the |
| poured it. Also, more importantly, do not get the | | | | standard coffee grinder type mixer it is wise to |
| concrete mix too wet as this can reduce the | | | | use approximately 6 minutes as a mixing cycle. |
| strength and it will be less able to withstand | | | | This will help you assess how long it will take for |
| weathering in the future. | | | | you to prepare all the concrete you will need, |
| Never throw the materials into the mixer, instead, | | | | when taking the volume output into consideration. |
| trickle it steadily over the rim. This is to prevent | | | | This is especially helpful knowledge to have when |
| the materials from sticking firmly to the back of | | | | you will be hiring a concrete mixer. |
| the drum and they will then only be dislodged by | | | | There are different consistencies or strengths of |
| stopping the mixer. The appropriate mixing time | | | | cement for different uses. Low-strength concrete |
| for concrete is 2 and a half minutes, beginning | | | | is normally used for house foundations. Some of |
| timing from when all the materials, including the | | | | the uses of medium-strength concrete are for |
| water, have entered the drum. It is important to | | | | house floors, footpaths and driveways. |
| remember not to over-mix as this will reduce the | | | | High-strength concrete is suitable for pre-cast |
| strength of the concrete and will cause | | | | concrete and heavy duty floors. Mortar is used |
| segregation of the coarser aggregates. | | | | for laying bricks and blocks. To lay 1000 bricks |
| Always ensure that you keep your mixer clean, | | | | you will need 3 sacks of cement and 0.6 cubic |
| because the slightest trace of material left in the | | | | meters of sand. Cement is also commonly used |
| drum will harden and attract more residue each | | | | for plastering! |
| time you use it. This will eventually render the | | | | |