The construction plan for dry-mixed composite lightweight aggregate concrete should meticulously outline the construction process, key operational points, and precautions to ensure quality and efficiency. Below is a construction plan compiled based on reference articles, presented in a clear and itemized format:
Construction Preparation
Materials Preparation:
Pre-mixed Powder: Ensure powder quality meets standards and store in a dry environment.
Composite Lightweight AggregateSelectedIn compliance with standards, each bag of inorganic lightweight aggregates, such as expanded clay, contains approximately 0.25 cubic meters.
Water: Clean drinking water for mixing concrete.
Other Tools: Mixers,砂浆泵砂浆Pumps, 50-inch Hoses, Vibrating Plates, Shovels, Custom Wooden Trowels, Long Bars, and Wooden Smoothers, etc.
Field-level processing:
Scrape away loose concrete and mortar from the subflooring.
Scrape off the cement paste with a wire brush and sweep the subgrade surface clean.
Based on the horizontal level lines on the wall, measure and mark the sub-base level, which can be temporarily affixed around the walls if conditions permit.
Section 2: Mixing & Transportation
Stirring:
Add a moderate amount of water to the blender.
Add one bag of pre-mixed underlayment powder and mix to a uniform slurry.
Add another bag of composite lightweight aggregate, and continue to mix to form a uniform concrete mixture.
Note the control of the water-cement ratio, generally 1:0.8.
Transportation:
For the pumping method, the mixture is pumped to the work surface using a mortar pump and a 50mm hose.
Ensure that the mixture remains uniform during the pumping process without any segregation.
III. Laying and Levelling
Laying:
The mixed composite lightweight aggregate concrete is evenly spread on the cleaned subgrade.
During installation, the thickness is controlled by the predetermined flat pads, usually elevated 3mm above the design elevation.
Leveling:
The concrete being laid is compacted and leveled using a plate vibrator.
If the layer is laid thinly, it can be compacted with a shovel or a special wooden board during laying.
Level with a large beam and smooth the surface with a wooden trowel.
IV. Maintenance and Inspection
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Once laid, the concrete is allowed to cure naturally. Typically, it requires three days of curing, during which the surface must be kept moist.
Avoid stirring mortar or storing heavy objects on the underlay during maintenance to prevent damage.
Acceptance:
Following maintenance, inspect the sublayer surface for evenness, no cracks, or hollowing.
Conduct strength tests to ensure compliance with design specifications.
Section 5: Precautions
Mixing Time: Strictly control the mixing time to ensure a uniform mixture.
Construction Time: The entire construction process must be completed within the specified time, generally no more than 3 hours.
Curing Conditions: Maintain a moist environment during curing, and avoid direct sunlight or rain wash.
Quality Control: Strengthen quality control during the construction process to ensure that material quality, mix ratios, mixing quality, and laying quality all meet the required standards.
By implementing the above construction plan, the construction quality of dry-mixed composite lightweight aggregate concrete can be ensured, achieving the anticipated performance effects.