Grouting construction

Basic processing

1. Clean the surface of the foundation without any debris such as crushed stones, floating slurry, floating ash, oil stains, and release agents.

2. 24 hours before grouting, the foundation surface should be fully wetted, and 1 hour before grouting, any accumulated water should be removed.
Quality assurance of secondary grouting material for steel structure base, Xinye high-strength grouting material

Hard foam spraying for external wall insulation is a new type of building energy-saving technology. After application in engineering examples, although there are still many areas that need improvement, the advantages of this technology are very obvious. The insulation performance of $g5K {} K.u_S `+M is good. 4b9 × 9pg-Q5D rigid foam spraying is a high thermosetting polymer and an excellent insulation material. Its thermal conductivity is. 15~. 25W/(m · k). Permanent mechanical anchoring, temporary fixation, through wall pipelines, or fixation of attachments on external walls often cause local thermal bridges. Therefore, the spraying process is adopted. Due to the high bonding strength between rigid foam spraying and general wall materials, there is no need for any adhesives or anchors. It is a natural adhesive material that can form a continuous insulation layer, ensuring the joint action of insulation material and wall and effectively blocking thermal bridges.

: Support mold

1. Set up templates according to the grouting construction drawing. The joints between templates and foundations, as well as between templates, shall be sealed with cement slurry, tape, etc. to achieve the degree of overall template waterproofing.

2. The horizontal distance between the template and the equipment base should be controlled at around 100mm to facilitate grouting construction.

3. The top elevation of the template should be 50mm higher than the surface of the equipment base.

4. If there is grout leakage during grouting, it should be dealt with in a timely manner.

 
In recent years, ceramic tiles have been increasingly used in energy-saving projects for external wall insulation. However, there are still many technical issues with using ceramic tiles in lightweight and flexible external wall insulation systems. Currently, these technical issues have not been taken seriously by wall insulation companies, and many projects have also experienced safety accidents where tiles fall off, which must be highly valued. The safety issue of ceramic tiles as the decorative layer of exterior wall insulation system is primarily due to the influence of their own weight. Compared with the coating decorative layer, the safety issue of ceramic tiles as the decorative layer for the external wall insulation system is primarily related to their own weight. The self weight of the exterior wall insulation system with paint as the decorative layer generally does not exceed 1 kilogram/square meter (insulation layer, crack resistant protective layer, exterior decorative layer), while the self weight of the exterior wall insulation system with ceramic tile decorative layer can reach 4 kilograms/square meter or even 7 kilograms/square meter, which is 4-7 times that of the paint system.

Step 3: Preparation of grouting material

1. The general reinforced type is mixed with water at a standard of 12-13%, while the pea gravel reinforced type is mixed with water at a standard of 9-10%.

2. It is recommended to use mechanical stirring method, and the stirring time is generally 1-2 minutes. When using manual mixing, 2/3 of the water should be added first and mixed for 2 minutes, then the remaining water should be added and mixed evenly

Toxicity: safety. The cleaning agent raw materials should not contain highly toxic materials, etc. The harm of cleaning agents to the environment is a very important issue. Recently, there was an incident in a city in Zhejiang Province where an external wall cleaning agent was sprayed and caused poisoning and death. The toxicity of stone cleaning agents, the possible irritation and damage to the skin, mucous membranes, respiratory system, and other parts, as well as the harm to the environment, can be determined by referring to the testing methods of the Ministry of Health for environmental agents (or by referring to the recently published American Association for Environmental Health Records). At present, the detection of toxicity of cleaning agents in China is still a weak link, and there are few reference detection methods.

3. The amount of mixing each time should be determined based on the amount used to ensure that the material is used up within 30 minutes.

4. During on-site use, it is strictly prohibited to add any admixtures or external additives to the grouting material.

Step 4: Grouting Construction Method

1. Long equipment or track foundations should be constructed in sections.

2. During secondary grouting, grouting should be carried out from multiple points on one side or adjacent sides until it overflows from the other side, in order to facilitate exhaust during the grouting process. Grouting shall not be carried out simultaneously from all four sides

The root causes of cracks in artificial stone cabinet countertops are mostly due to three reasons: lack of care or improper use, the addition of a large amount of calcium powder to artificial stone, and uneven cabinet production. Regardless of the reason, it always comes from a human perspective. Therefore, when making cabinets, one must first understand some basic knowledge of artificial stone countertops. Secondly, when choosing, one must identify the quality of artificial stone. Finally, when making cabinets, attention should be paid to stability to avoid problems and troubles after installation. Why do artificial stone countertops crack? 1. It is because the countertop needs to be carefully maintained if it is not taken care of or used improperly. A normal artificial stone countertop can withstand a temperature of 13 ℃, especially if it cannot be heated locally. Even quartz stone with good high temperature resistance can explode if the temperature is very high in an instant. Avoid using open flames or high temperatures to directly bake, roast, or burn the countertop; Do not place the hot pot on the stove directly on the countertop for cooking. Instead, use insulation materials such as pads; Cut vegetables and prepare food on the chopping board, and do not use metal sharp objects (such as kitchen knives) to directly carve or chop on the countertop to avoid surface damage and potential cracks.

3. After grouting begins, it must be carried out continuously without interruption. And shorten the grouting time as much as possible.

4. Vibration is strictly prohibited during the grouting process. If necessary, a grouting booster can be used to push the grouting material along the bottom of the grouting layer. It is strictly prohibited to push it from the middle or upper part of the grouting layer to ensure its uniformity.

5. After the equipment foundation grouting is completed, a 45 degree oblique angle should be cut outward along the edge of the equipment 3-6 hours after grouting to prevent cracks from forming at the free end. If edge cutting is not possible, the surface of the grouting layer should be smoothed with a trowel 3-6 hours after grouting.

6. The thickness of each grouting material should not exceed 100mm.

Author Chen Jianwu; Keywords: building energy efficiency; Insulation layer; Crack resistance; Maturation; This article will introduce the complex construction process of FBW modified rigid foam waterproof and insulation integrated material system with engineering examples, focusing on the technical measures and construction experience adopted in construction difficulties, quality control, and finished product protection. In building energy efficiency, insulation and heat preservation of the roof are crucial. The FBW modified rigid foam waterproof and insulation integrated material system is a new type of material that integrates waterproofing, insulation, heat insulation, sound insulation, and vibration absorption functions. This foam system was originally applied in fields such as ice boxes and cold storage, and has now been developed for use in roofs. This article will introduce the construction process quality control of this system with engineering examples.

7. When the grouting volume of the equipment foundation is large, the mixing of pea gravel reinforced grouting material should be done by mechanical mixing to ensure grouting construction.

Step 5: Maintenance

1. Within 30 minutes after grouting is completed, a wet grass curtain or rock wool blanket should be immediately covered and kept moist.

2. During winter construction, maintenance measures should also comply with the relevant provisions of the current GB50204 standard.

3. After the grouting material reaches the demoulding time, equipment installation can be carried out. For specific time, please refer to the "Relationship Table between Demoulding and Curing Time and Environmental Temperature".

4. After the grouting of the equipment foundation is completed, if any parts need to be removed, they can be gently removed with a spatula or shovel tool 3-6 hours after the grouting is completed, before the grouting layer hardens.

5. The vibration of the running machine should not be transmitted to the equipment foundation. After the secondary grouting, the machine should be stopped for 24-36 hours to avoid damaging the uncured grouting layer.

Sand drying equipment is relatively expensive, and currently insulation mortar manufacturers mainly purchase finished sand that has been dried and screened. Finished sand is mostly packaged in bags and stacked on the workshop floor. This system is designed as an underground feeding hopper, which can be directly unpacked on the hopper, or bulk sand can be directly poured into the feeding hopper with a handcart. Auxiliary materials such as rubber powder, fibers, etc. are currently packaged in bags, and lightweight materials are mainly packaged in bags and stored on the workshop floor. Cement and fly ash are fed into the measuring scale using a screw conveyor, while sand is fed into the measuring scale using a bucket elevator to extend the service life of the machinery. The three materials are weighed and accumulated together. The materials used for one mixing are 45 kilograms of cement, 9 kilograms of sand, and 15 kilograms of fly ash. This data is input into the instrument or computer. After the system is started, the system automatically starts the cement conveying screw. When the weight of cement entering the weighing hopper reaches 45 kilograms, it stops and the sand elevator automatically starts. When the total weight of the two materials in the weighing hopper reaches 135 kilograms, the elevator stops and the fly ash conveying screw is started. When the total weight of the three materials in the weighing hopper reaches 15 kilograms, it stops and completes the automatic measurement of the three materials.

Recommended dosage

Calculate the actual usage based on a reference dosage of 2.28-2.4 tons/cubic meter.

Packaging, storage and transportation

1. Packaging specifications: 50kg ± 1kg per bag, stored in a ventilated and dry place and protected from direct sunlight.

2. The shelf life is 3 months. If it exceeds the shelf life, it should be retested and qualified before use.

3. Does not contain components such as benzene derivatives, halogenated hydrocarbons, heavy metals, etc., non-toxic, odorless, pollution-free, non flammable and non explosive, and can be transported as general cargo