Precast site layout ① the design of component storage yard should be coordinated with the component processing plant.

At present, the most widely used precast components are precast partition walls, laminated floors and precast stairs.

1.

In order to actively respond to the requirements of the government and relevant departments on the promotion and application of precast buildings, the original design of the high-rise building of the project is to adjust the part of the aerated concrete block wall to ALC partition board.

Compressive strength ALC partition board 5-7.5mpa, ceramsite concrete partition board 7-10mpa; ALC partition board has low compressive strength, easy to break and damage, and relatively large loss rate; 5.

Each building on site shall be equipped with a dedicated precast component unloading area, and the component storage yard shall be set on the inside of the road near the building.

Concept analysis ALC partition board is a porous concrete formed board (containing treated reinforcement) made of fly ash (or silica sand), cement, lime and other main raw materials and cured by high-pressure steam; Ceramsite concrete partition board: it is a light strip wall board made of lightweight aggregate concrete with ceramsite, ceramsite sand, cement, sand, aerator, water, etc.

Through comprehensive evaluation, ceramsite concrete partition board is preferred, but there are doubts about the large weight and easy fracture of ceramsite concrete; Therefore, ALC partition board and ceramsite concrete partition board are selected for the real building proofing of the same floor and the same house type; As the main application part of the industrialized wall of the project is the indoor partition wall of the standard floor, the shortcomings of ALC partition board with high water absorption are weakened, and the shortcomings of ceramsite concrete partition board with large weight and easy fracture are reflected in the construction period.

3.

Moisture proof performance ALC partition board has high moisture content and high capillary water absorption, which is not suitable for use in kitchen and bathroom rooms; Ceramsite concrete partition board has low moisture content, good moisture-proof and waterproof performance, and can also be used in kitchen and bathroom rooms; 8.

Built in reinforced ALC partition board double-layer unidirectional iron wire 0.28cm, ceramsite concrete partition board double-layer bidirectional reinforcement mesh 4.0cm; 6.

To sum up, since half of the on-site construction organization design is prepared by the general contractor, the general contractor shall set up reasonable roads in advance according to the construction specifications of the project, and the increase of on-site costs caused by roads and other design reasons in the later stage shall not be considered..

as the base material, built-in two-way reinforcement, and cured by high temperature and high pressure steam twice.

Molding process ALC partition board adopts autoclave molding; Ceramsite concrete partition board is divided into formwork autoclaved partition board and extruded partition board by construction technology; Extrusion molding board is easy to fracture, and its current market share is far lower than that of autoclaved molding board.

The project team conducted in-depth investigation and Research on these two types of walls in terms of market utilization rate, construction difficulty, construction efficiency, economic benefits, customer complaint risk and other dimensions.

2.

2.

At the same time, the width of the components extending out of the vehicle should be considered.

The shortcomings are strengthened, and multi departments jointly decide to adopt ALC partition board for the project.

Taking a project as an example, this paper briefly analyzes the construction technology and cost composition of partition board.

Comprehensive unit price ALC partition board 200mm thick 220-250 yuan / ㎡; Ceramsite concrete partition board 200mm thick 190-230 yuan / ㎡ conclusion: ceramsite concrete partition board and ALC partition board have their own characteristics.

At present, precast buildings are becoming more and more common in the construction market.

Under the condition of large production capacity and storage capacity, direct lifting and installation on the transport vehicle should be adopted as far as possible; If the capacity or storage capacity of the factory is small, it is necessary to consider storing some emergency components on site, and determine the size of the stacking site according to the model, quantity and stacking layer requirements; ② Requirements of transportation components for site roads: the trailer for component transportation has a length of 6m, a length of 15m, and a maximum turning radius of 24m.

The following is a detailed comparative analysis of autoclaved molding board and ALC partition board; 4.

Therefore, the width of the construction road should be set to meet the transportation of precast components, other construction materials and concrete.

According to market research, ALC partition board and ceramsite concrete partition board are widely used as industrialized walls in the construction market as opposed to traditional masonry walls.

Installation efficiency ALC partition board, a group of 3-4 people, about 2.5 days / floor (four households); Ceramsite concrete partition board, a group of 4-5 people, 2.5 days / floor (four households); The construction efficiency of ceramsite concrete is relatively low; 10.

PVC Chamfer

(vehicle brand and model) with a full load weight of 65 tons.

After many meetings and collisions, various professional ports, Considering the construction site conditions and economic factors of the project, ALC partition board is finally adopted for the inner wall.

Construction process cleaning base wall → positioning and setting out → fixing U-shaped card → plate hoisting in place and installation → perpendicularity and flatness verification → bottom joint mortar plugging → top joint foaming filling and hanging mesh → plate joint hanging mesh patching before painting.

Sound insulation ALC partition board >45db, ceramsite concrete partition board >45db, can be used as indoor partition wall; 9.

Topic 01 selection of internal partition board scheme 02alc partition board construction process and construction site concerns 03alc partition board cost analysis 01 selection of internal partition board scheme this project is located in a city in North China, and its business is mainly high-rise buildings, with a total construction area of about 187000 square meters and an above ground construction area of about 152000 square meters.

02alc partition board construction process 1.

Product appearance ALC partition board: solid board, slotted water and electricity, light weight; Ceramsite concrete partition board: hollow slab, water and electricity can be reserved, and the quality is heavy.

Area density 100mm thick ALC partition board 65-75kg/ ㎡, ceramsite concrete partition board 93-95kg/ ㎡; Ceramsite concrete partition board is heavy and its construction efficiency is low; 7.

The width of the main road should not be less than 8m, and the width of the branch road should be 4-6m.

The turning of vehicles and the bearing capacity of construction roads should be considered for site construction roads.