鎂水泥在天然養護條件下其體積是一個連續脹大進程，其線脹大率為0.1~0.2%，體積脹大率約為

Magnesium cement undergoes a continuous expansion process in volume under natural curing conditions, with a linear expansion rate of 0.1~0.2% and a volume expansion rate of approximately

菱鎂礦在服燒進程中不可避免地發生部分過燒，使一部分MgO呈死燒狀況，過燒的MgO水化進程很慢，當已構成強度的水泥石中的MgO再遇水進行水化時，生成Mg(OH)2，體積脹大

During the sintering process of magnesite, partial overburning is inevitable, resulting in a dead burning state of some MgO. The hydration process of overburned MgO is very slow. When MgO in the cement stone that has already formed strength is hydrated with water, it generates Mg (OH) 2, causing volume expansion

輕燒氧化鎂中游離CaO水化時體積脹大90%，而鹵片中存在著SO42-，當Ca(OH)2轉化成石膏時，固體體積將增加2倍以上，導致制品變形，這也是束縛輕燒氧化鎂中游離CaO含量、鹵片中SO42-含量的原因

During the hydration of free CaO in lightly burned magnesium oxide, the volume expands by 90%, while there is SO42- present in the brine sheet. When Ca (OH) 2 is converted into gypsum, the solid volume will increase by more than twice, causing deformation of the product. This is also the reason why the free CaO content in lightly burned magnesium oxide and the SO42- content in the brine sheet are constrained

MgO-Mg-C12-H2O體系水化進程是一個激烈的放熱反響進程，而出產的管道體積又大，若環境溫度較高，則反響升溫進程，板材本體溫度過高，反響不充沛，構成較大的結晶應力和熱脹大應力，使制品體積脹大。

The hydration process of MgO-Mg-C12-H2O system is an intense exothermic reaction process, and the volume of the produced pipeline is large. If the ambient temperature is high, it will reflect the heating process. If the temperature of the board body is too high, the response is not sufficient, forming a large crystallization stress and thermal expansion stress, causing the volume of the product to expand.

風管加工設備安排在修建物內時，應考慮修建物樓板、梁的承載才干，需求時應采納相應辦法。關于潔凈體系的風管制造應有潔凈封閉倉庫貯存制品或半制品。

When arranging the air duct processing equipment inside the building, the load-bearing capacity of the building's floor slabs and beams should be considered, and corresponding methods should be adopted when needed. The manufacturing of air ducts for clean systems should have clean enclosed warehouses for storing products or semi-finished products.

風管加工場所應預留現場資料、制品以及半制品的運送通道，風管加工場所的挑選不得阻撓消防通道。大樣圖、體系圖經審查契合要求，并進行了技能及交底。

The air duct processing site should reserve transportation channels for on-site data, products, and semi-finished products, and the selection of air duct processing sites should not obstruct fire exits. The detailed drawings and system diagrams have been reviewed and found to meet the requirements, and skills and disclosures have been made.

風管加作業業地址應有安放施工機具和資料堆積場所，設備和電源應有牢靠的防護設備。作業場所路途應疏通。需求有能滿意消防要求的各種器械及設備。

There should be a place for construction equipment and data storage in the air duct and operation site, and the equipment and power supply should have reliable protective equipment. The route to the workplace should be cleared. We need various instruments and equipment that can meet the fire protection requirements.

風管預制應有獨立的作業場所，場所應平坦、清洗，加工途徑應找平。雙面鋁箔絕熱板風管等其他復合資料風管的場所應單調，應有滿意的制品堆積場所。

The prefabrication of air ducts should have an independent workplace, which should be flat and clean, and the processing path should be leveled. The location of double-sided aluminum foil insulation board air ducts and other composite material air ducts should be monotonous, and there should be a satisfactory place for product stacking.

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