Featured Image: Image of Mortar Cement Blocks
Mortaring cement blocks is a crucial step in constructing sturdy and durable structures. While it may appear daunting initially, it is a relatively straightforward process that can be mastered with the right techniques. Whether you’re a seasoned professional or a DIY enthusiast, understanding the intricacies of mortar application will ensure the longevity and integrity of your cement block project.
Before embarking on the task, it’s essential to gather the necessary materials and tools. Firstly, you will need mortar mix, which is a combination of cement, sand, and water. The ideal proportions vary depending on the specific application, but a common ratio is 1 part cement to 3 parts sand. Additionally, you will require a mixing tub, trowel, level, and a pointing tool. Once your materials are assembled, it’s time to prepare the mortar.
Mixing mortar involves combining the dry ingredients (cement and sand) in the mixing tub. Gradually add water while stirring until you achieve a homogeneous paste with a consistency similar to thick peanut butter. The mortar should be workable but not too watery, as this can compromise its strength. Once the mortar is mixed, it’s ready to be applied to the cement blocks.
Striking the Joints
Once the mortar has set slightly, typically within 30 minutes to an hour, it’s time to strike the joints. This process involves shaping and smoothing the mortar in the gaps between the blocks to create a uniform and aesthetically pleasing finish.
Here’s a detailed guide on striking the joints:
1. Select the Right Tool:
Choose a suitable jointing tool, such as a tuck pointer, a concave jointing tool, or a V-shaped jointer. Select a tool that corresponds to the desired joint shape.
2. Wet the Tool:
Dip the jointing tool in water to prevent it from sticking to the mortar. This will help smoothen the process.
3. Insert the Tool and Apply Pressure:
Insert the jointing tool into the mortar joint at a slight angle. Press down firmly and draw the tool along the joint, creating the desired shape.
4. Remove Excess Mortar:
As you shape the joint, excess mortar may accumulate on top and along the edges. Use a flat trowel or a wet sponge to remove any excess and achieve a clean finish.
5. Finishing Touches:
After shaping the joints, you can further enhance their appearance by using a pointed trowel or a small piece of wood. These tools can create decorative patterns or textures in the mortar, adding character and detail to the wall.
| Joint Type | Joint Shape |
|---|---|
| Raked joint | V-shaped |
| Convex joint | Rounded |
| Concave joint | Indented |
| Flush joint | Level with block surface |
How to Mortar Cement Blocks
Mortaring cement blocks is a relatively simple process, but it is important to do it correctly in order to ensure that the wall is strong and durable. Here are the steps on how to mortar cement blocks:
1. **Prepare the surface.** The first step is to prepare the surface where the cement blocks will be laid. This involves clearing away any debris or vegetation, and leveling the ground. You can use a string line to mark out the area where the wall will be built.
2. **Mix the mortar.** The next step is to mix the mortar. Mortar is a mixture of cement, sand, and water. The proportions of each ingredient will vary depending on the type of cement and sand you are using. Generally, a good mix is 1 part cement to 3 parts sand to 1 part water.
3. **Apply the mortar to the blocks.** Once the mortar is mixed, you can begin to apply it to the cement blocks. Use a trowel to apply a thin layer of mortar to the bottom and sides of the block. Then, place the block on the prepared surface and press down firmly.
4. **Level the blocks.** Once the blocks are in place, you need to level them. You can use a level to check the blocks and make sure that they are level in all directions. If a block is not level, you can use a hammer to tap it into place.
5. **Join the blocks together.** Once the blocks are level, you need to join them together with mortar. Use a trowel to apply a thin layer of mortar to the top of the bottom block. Then, place the next block on top and press down firmly. Repeat this process until all of the blocks are in place.
6. **Cure the mortar.** Once the mortar is in place, you need to allow it to cure. This process can take several days, depending on the weather conditions. During this time, it is important to keep the mortar moist by spraying it with water or covering it with plastic. This will help to prevent the mortar from drying out and cracking.
People Also Ask About How to Mortar Cement Blocks
Does the type of cement block matter?
The type of cement block you use will affect the strength and durability of the wall. There are two main types of cement blocks: solid and hollow. Solid cement blocks are more expensive, but they are also stronger and more durable. Hollow cement blocks are less expensive, but they are not as strong or durable.
What is the best way to mix mortar?
The best way to mix mortar is to use a mortar mixer. This will help to ensure that the mortar is mixed thoroughly and that there are no lumps. If you do not have a mortar mixer, you can mix the mortar by hand using a hoe or a shovel.
How long does it take for mortar to cure?
The time it takes for mortar to cure will depend on the weather conditions. In general, mortar will cure in about 7 days in warm, dry weather. In cold, wet weather, it may take longer for the mortar to cure.
