Foamed concrete is a bubble-like heat insulation material, which is characterized by the formation of closed foam holes in the interior of the concrete, making the concrete lightweight and thermal insulation. Widely used in construction, engineering, gardening, industry. So, what is the construction of foamed concrete? Let's take a look at it.
First, construction preparation
1.1 Materials and Main Equipment:
1.1.1 Foaming agent: HT001 type compound polymeric foaming agent.
1.1.2 Cement: The use of 32.5 ordinary Portland cement or composite Portland cement.
1.1.3 Fly ash: First-grade fly ash is used.
1.1.4 HT-18 foaming machine, special water bag, scale, trolley, dilute container, flat file, sharp iron file, scraper bar, wooden trowel, rubber hose, iron rake, wire brush, etc.
1.2 Operating conditions:
1.2.1 The quality of the main structure project has completed the acceptance procedures. After the door frame is installed, the (daughter) wall has already played the +50cm level elevation line around the wall.
1.2.2 The warm and sanitary pipelines that have passed through the floor have been installed. The pipes and holes have been filled with fine-grained concrete and have been packed densely.
1.2.3 The relevant electrical pre-burial and other projects have been completed.
1.2.4 The requirements for foamed concrete have been determined through commissioning
Second, the process
Inspection of cement, sand, foaming agent quality → Mixture ratio test → Technical disclosures → Preparation of equipment equipment → Substrate cleaning → Target elevation → Stirring, concrete pouring → Leveling, calendering → Maintenance → Inspection and acceptance
2.1 Substrate treatment: Clean up the base waste and spray it wet before pouring the concrete.
2.2 To find the elevation: According to the horizontal standard line and the design thickness, the upper level elevation control line of the surface layer will be popped up on the surrounding walls and columns.
2.3 Concrete mixing: The mix ratio of concrete should be determined by tests according to design requirements. The material must be strictly pounded and the mix ratio must be precisely controlled. The order of feeding of each material is cement → sand → foaming agent → water.
2.4 Leave the test block as required.
2.5 Laying: The substrate shall be wetted before laying, and a prime cement or interface binder shall be brushed on the substrate, and the uniformly-mixed concrete shall be laid out from the room and put out of the room. The concrete shall be filled with concrete at the low defect area during vibration or rolling. .
2.6 leveling, calendering: When the surface layer of ash water, with a wooden trowel hit hard, smooth.
For the first time, apply pressure: Use an iron trowel to gently apply pressure until it is discharged;
The second time wipe pressure: After the initial setting of the surface layer mortar, fill the pits and trachoma with an iron trowel to make sure that it cannot be leaked.
The third time the pressure is applied: Before the final setting of the surface layer mortar, apply pressure with an iron trowel to press and smooth all the trowels to achieve a dense and smooth surface.
2.7 Maintenance: Coverage and sprinkling should be carried out 24 hours or so after the completion of the construction, not less than 2 times a day. No person is allowed, and the maintenance period should not be less than 7 days. 
Third, the process requirements
3.1 Primary treatment: The concrete floor slab is treated before the foam concrete insulation (or cushion) is cast, the loose concrete, laitance, etc. bonded to the foundation are removed with a tweezer, and the cement slurry is brushed off with a wire brush. Skin, then sweep with a broom.
3.2 To find the standard high-elasticity level control line: According to the +50cm horizontal elevation line on the wall, measure the elevation of the heat insulation layer downwards, and when it is conditional, it can be projected on the surrounding wall.
3.3 Ingredients pulping: The cement and fly ash, after the measurement by adding mixer, 10% foaming agent aqueous solution made about 1mm fine uniform foam, and then the foam was added to the mixer; foam and cement slurry mixed, made Foam concrete slurry.
3.4 High-pressure pipeline transportation: start the foaming machine and pump the foamed concrete slurry to the construction surface with a pouring pump;
3.5 Casting: Cast foam concrete slurry to the construction surface.
3.5.1 Every day stirring foam concrete slurry should be debugged to determine the slurry density of 600 kg/m3 or so, determine the normal foaming before construction.
3.5.2 Observe and inspect the slurry foaming and pouring conditions and fluidity at any time during construction and pouring, and strictly control the pouring thickness and surface flatness.
3.5.3 Before laying foam concrete, sprinkle water on the base and moisten it, then start laying it from one end.
3.6 Leveling: After the initial setting of foamed concrete, check the flatness with the horizontal elevation line and the leveling line on the wall. The high shovel is removed and the recess is filled. Use a flat wooden scraper to flatten the surface, and then use a wooden trowel to flatten the surface. The ground with slope requirements shall be constructed according to the designed slope.
3.7 After the foam concrete is poured, it is naturally cured for 3-7 days, and other projects can be carried out when it can reach the people.
Fourth, quality standards
4.1 The thickness and strength of the production should meet the contract design requirements.
4.2 Before the insulation layer (or cushion) is laid, the surface of the next layer should be wetted.
4.3 Large area foam concrete cushions such as industrial plants, auditoriums, foyers, etc. shall be poured in sections. Sub-segments should be divided in relation to the location of deformation joints, different types of construction ground connections and equipment foundations.
The construction technology of foamed concrete is introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information.
Concrete staircase
Ac Heat Exchanger,Tube Heat Exchanger,Finned Pipe Heat Exchanger,Aluminium Heat Exchanger
Suzhou Green New Material Technology Co., Ltd. , https://www.szgreenvip.com