CN104264881A - Magnesium cement lightweight aggregate concrete hollow box board - Google Patents
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Abstract
本发明公开了一种镁水泥轻骨料混凝土空心箱板，是由镁水泥轻骨料混凝土、钢筋和轻质复合箱体组成。所用镁水泥轻骨料混凝土的干表观密度为1800~1950kg/m3，比普通混凝土的干表观密度轻15%～30%，而其强度可达到普通混凝土常用的强度等级。采用本发明镁水泥轻骨料混凝土空心箱板能减轻结构自重，节省混凝土用量，降低总体造价；还能减少结构的地震反应力、楼层剪力、弯矩、楼层最大位移等，使各项力学性能均符合规范要求；并具有良好的防火、隔音和隔热性能，节能、保温效果明显，具有非常好的经济、社会和环保效益，适合于在大跨桥梁结构、高层建筑和海事工程中大规模推广应用。
The invention discloses a magnesium cement lightweight aggregate concrete hollow box plate, which is composed of magnesium cement lightweight aggregate concrete, steel bars and a lightweight composite box body. The dry apparent density of the magnesium cement lightweight aggregate concrete used is 1800~1950kg/m 3 , which is 15%~30% lighter than that of ordinary concrete, and its strength can reach the strength grade commonly used in ordinary concrete. The magnesium cement lightweight aggregate concrete hollow box slab of the present invention can reduce the self-weight of the structure, save the amount of concrete, and reduce the overall cost; it can also reduce the seismic response force, floor shear force, bending moment, and maximum floor displacement of the structure, so that various mechanics The performance is in line with the requirements of the specification; it has good fire prevention, sound insulation and heat insulation performance, energy-saving and heat preservation effects are obvious, and it has very good economic, social and environmental benefits. It is suitable for large-scale construction in long-span bridge structures, high-rise buildings and marine projects. Scale application.
Description
技术领域 technical field
本发明属于建筑材料领域，具体涉及一种镁水泥轻骨料混凝土空心箱板。 The invention belongs to the field of building materials, and in particular relates to a magnesium cement lightweight aggregate concrete hollow box plate.
背景技术 Background technique
现浇混凝土空心无梁楼盖施工技术是现有板式结构施工技术的一种发展和创新，其主要技术特征是将高强度复合管（或轻质复合箱体）预埋入混凝中成为永久性的芯模，而使之成型的一种现浇空心楼盖。该技术不但可大幅度减轻楼盖自重，刚度大；并能充分发挥材料的力学性能，集中解决了设计中室内纵横方向由于结构梁设置密集而难以保证室内净高等诸多矛盾，使结构更趋合理；而且具有降低层高，隔音效果好，抗震性能好等优点；有利于管线埋设、节约模板、加快施工进度及降低工程成本，其综合效益较好。 The construction technology of the cast-in-place concrete hollow beamless floor is a development and innovation of the existing slab structure construction technology. A cast-in-place hollow floor made of a permanent mandrel. This technology can not only greatly reduce the weight of the floor, but also increase the rigidity; it can also give full play to the mechanical properties of the material, and solve many contradictions in the design, such as the difficulty in ensuring the indoor net height due to the dense arrangement of structural beams in the indoor vertical and horizontal directions, making the structure more reasonable ; And it has the advantages of lower floor height, good sound insulation effect, and good seismic performance; it is beneficial to pipeline burying, saving templates, speeding up construction progress and reducing project costs, and its comprehensive benefits are better.
同时，在提倡建筑节能的21世纪，国家对建筑抗震性能及节能环保性能的要求不断提高。轻骨料混凝土（尤其陶粒混凝土）由于具有轻质的特点和良好的保温隔热性能，正从非承重结构开始往承重结构方向发展。轻骨料混凝土空心箱板具有高强度、轻质、保温隔热性能好、抗震、耐腐蚀性能显著等特点，是一种新型多功能楼板，特别适用于结构恒载占较大比例的高层建筑、大跨径桥梁和海洋工程等，其应用前景非常广阔。 At the same time, in the 21st century when building energy conservation is advocated, the country's requirements for building anti-seismic performance and energy-saving and environmental protection performance continue to increase. Lightweight aggregate concrete (especially ceramsite concrete) is developing from a non-load-bearing structure to a load-bearing structure due to its light weight and good thermal insulation performance. Lightweight aggregate concrete hollow box slab has the characteristics of high strength, light weight, good thermal insulation performance, earthquake resistance and corrosion resistance. It is a new type of multifunctional floor slab, especially suitable for high-rise buildings where the structural dead load accounts for a large proportion. , long-span bridges and marine engineering, etc., its application prospects are very broad.
镁水泥具有早凝高强、耐水、耐高温等特点，本发明采用镁水泥轻骨料混凝土与钢筋浇筑成空心箱板，与传统的普通混凝土空心板相比，具有轻质高强、抗震性能优异，防火性好、保温隔热和耐久性能好，在大跨桥梁结构、高层建筑和海事工程中具有广阔的应用前景，而随着可持续发展战略的贯彻实施，本发明空心箱板的优势将更加突显。 Magnesium cement has the characteristics of early setting, high strength, water resistance, and high temperature resistance. The present invention uses magnesium cement lightweight aggregate concrete and steel bars to cast hollow box slabs. Compared with traditional ordinary concrete hollow slabs, it has light weight, high strength, and excellent seismic performance. Good fire resistance, good heat insulation and durability, has broad application prospects in long-span bridge structures, high-rise buildings and marine engineering, and with the implementation of sustainable development strategies, the advantages of the hollow box plate of the present invention will be more stand out.
发明内容 Contents of the invention
本发明的目的在于提供一种镁水泥轻骨料混凝土空心箱板，具有轻质高强、抗震性能优异，防火性好、保温隔热和耐久性能好，通过能源消耗等各项经济指标的综合对比，本发明镁水泥轻骨料混凝土制成的空心箱板的经济、社会和环保效益显著。 The purpose of the present invention is to provide a magnesium cement lightweight aggregate concrete hollow box slab, which has light weight, high strength, excellent shock resistance, good fire resistance, good thermal insulation and durability, and is comprehensively compared with various economic indicators such as energy consumption. , the economical, social and environmental benefits of the hollow box plate made of the magnesium cement lightweight aggregate concrete of the present invention are remarkable.
为实现上述目的，本发明采用如下技术方案： To achieve the above object, the present invention adopts the following technical solutions:
一种镁水泥轻骨料混凝土空心箱板是由镁水泥轻骨料混凝土、钢筋和轻质复合箱体组成；即将钢筋按模板绑扎好，在其中放入轻质复合箱体，浇注镁水泥轻骨料混凝土使其成型后拆模制成。 A magnesium cement lightweight aggregate concrete hollow box slab is composed of magnesium cement lightweight aggregate concrete, steel bars and lightweight composite boxes; Aggregate concrete is formed and then demoulded.
所述镁水泥轻骨料混凝土中各组分及其用量为： Each component and consumption thereof are in the described magnesium cement lightweight aggregate concrete:
镁水泥 450～500 kg/m3； Magnesium cement 450～500 kg/m 3 ;
砂 650～700 kg/m3； Sand 650～700 kg/ m3 ;
轻骨料 500～600 kg/m3； Light aggregate 500～600 kg/m 3 ;
水 150～200 kg/m3； Water 150～200 kg/ m3 ;
高效减水剂 8～10 kg/m3； Superplasticizer 8～10 kg/m 3 ;
所述镁水泥轻骨料混凝土的干表观密度为1800~1950kg/m3。 The dry apparent density of the magnesium cement lightweight aggregate concrete is 1800-1950kg/m 3 .
所述镁水泥由磷酸二氢钾、重烧镁粉和硼砂组成；其中磷酸二氢钾的用量为混凝土质量的8～10%、重烧镁粉的用量为混凝土质量的24～30%、硼砂的用量为混凝土质量的0.5～1.5%。 The magnesium cement is composed of potassium dihydrogen phosphate, dead-burned magnesium powder and borax; wherein the consumption of potassium dihydrogen phosphate is 8-10% of the concrete quality, the consumption of dead-burned magnesium powder is 24-30% of the concrete quality, borax The dosage is 0.5-1.5% of the concrete mass.
所述轻骨料包括陶粒、火山渣和煤矸石；其中陶粒为页岩陶粒、粉煤灰陶粒及粘土陶粒中的一种或几种。 The lightweight aggregate includes ceramsite, volcanic slag and coal gangue; wherein the ceramsite is one or more of shale ceramsite, fly ash ceramsite and clay ceramsite.
本发明的显著优点在于： Significant advantage of the present invention is:
（1）在高层、超高层建筑中，采用镁水泥轻骨料混凝土替代传统混凝土制备空心箱板，可使结构自重降低10%～20%。在地震发生时，由于地震作用和上部结构的自重成正比，采用本发明提出的镁水泥轻骨料混凝土空心箱板，可使地震产生的水平剪力大大降低。另外，镁水泥轻骨料混凝土的弹性模量低，结构自重小，与传统混凝土空心箱板相比，本发明镁水泥轻骨料混凝土空心箱板变形能力和延展性更好，抗震性能更好。 (1) In high-rise and super high-rise buildings, using magnesium cement lightweight aggregate concrete instead of traditional concrete to prepare hollow box slabs can reduce the weight of the structure by 10% to 20%. When an earthquake occurs, since the earthquake action is directly proportional to the self-weight of the superstructure, the horizontal shear force generated by the earthquake can be greatly reduced by using the magnesium cement lightweight aggregate concrete hollow box slab proposed by the present invention. In addition, the magnesium cement lightweight aggregate concrete has a low elastic modulus and a small structural weight. Compared with the traditional concrete hollow box slab, the magnesium cement lightweight aggregate concrete hollow box slab of the present invention has better deformation ability and ductility, and better seismic performance. .
（2）采用本发明镁水泥轻骨料混凝土空心箱板，可减轻结构自重，减少梁、柱截面尺寸，增加建筑使用面积；减少梁、剪力墙和基础的配筋，减少传给基础的荷载，从而降低了基础造价。 (2) The magnesium cement lightweight aggregate concrete hollow box slab of the present invention can reduce the self-weight of the structure, reduce the cross-sectional size of beams and columns, and increase the building use area; reduce the reinforcement of beams, shear walls and foundations, and reduce the energy transmitted to the foundations. Load, thereby reducing the foundation cost.
（3）本发明镁水泥轻骨料混凝土的传热系数是普通混凝土的1/2～1/3，热惰性指标更大，热工性能（保温和隔热性能）好；使所制得的镁水泥轻骨料混凝土空心箱板隔音和防火性能好，舒适度好，节能效果明显。 (3) The heat transfer coefficient of the magnesium cement lightweight aggregate concrete of the present invention is 1/2 to 1/3 of that of ordinary concrete, the thermal inertia index is larger, and the thermal performance (heat preservation and heat insulation performance) is good; the prepared Magnesium cement lightweight aggregate concrete hollow box slab has good sound insulation and fire resistance performance, good comfort and obvious energy saving effect.
（4）本发明镁水泥轻骨料混凝土空心板可实现真正的平板，可随意布置房间格局；同时由于楼板中混凝土大量被抽空，降低了结构的自重，但不会降低平板的刚度，能够满足现代建筑大跨度、大空间的新型楼盖体系的要求，是未来现浇混凝土楼板的重要发展方向，有广阔的应用前景。 (4) The magnesium cement lightweight aggregate concrete hollow slab of the present invention can realize a real slab, and the room layout can be arranged at will; at the same time, because a large amount of concrete in the slab is evacuated, the self-weight of the structure is reduced, but the rigidity of the slab will not be reduced, which can meet The requirement of a new floor system with large span and large space in modern buildings is an important development direction of cast-in-place concrete floor slabs in the future, and has broad application prospects.
（5）本发明镁水泥轻骨料混凝土中所用的轻骨料，可以采用页岩、工业废料、燃料废渣以及河流湖泊中的淤泥等作为原料来进行生产，使废物循环利用，可有效减少自然资源的消耗，环保效益明显。 (5) The lightweight aggregate used in the magnesium cement lightweight aggregate concrete of the present invention can be produced using shale, industrial waste, fuel waste residue, and silt in rivers and lakes as raw materials, so that waste can be recycled, which can effectively reduce natural pollution. Resource consumption, environmental protection benefits are obvious.
附图说明 Description of drawings
图1是本发明镁水泥轻骨料混凝土空心箱板横截面的结构示意图，其中1-钢筋；2-镁水泥轻骨料混凝土；3-轻质复合箱体。 Fig. 1 is the structure schematic diagram of the cross-section of magnesium cement lightweight aggregate concrete hollow box slab of the present invention, wherein 1-steel bar; 2-magnesium cement lightweight aggregate concrete; 3-light composite box.
具体实施方式 Detailed ways
为了使本发明所述的内容更加便于理解，下面结合具体实施方式对本发明所述的技术方案做进一步的说明，但是本发明不仅限于此。 In order to make the content of the present invention easier to understand, the technical solutions of the present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited thereto.
实施例1Example 1
一种镁水泥轻骨料混凝土空心箱板是由镁水泥轻骨料混凝土、钢筋和轻质复合箱体组成；即将钢筋按模板绑扎好，在其中放入轻质复合箱体，浇注镁水泥轻骨料混凝土使其成型后拆模制成。 A magnesium cement lightweight aggregate concrete hollow box slab is composed of magnesium cement lightweight aggregate concrete, steel bars and lightweight composite boxes; Aggregate concrete is formed and then demoulded.
所述镁水泥轻骨料混凝土中各组分及其用量为： Each component and consumption thereof are in the described magnesium cement lightweight aggregate concrete:
镁水泥 475 kg/m3； Magnesium cement 475 kg/m 3 ;
砂 676 kg/m3； Sand 676 kg/m 3 ;
轻骨料 560 kg/m3； Lightweight aggregate 560 kg/m 3 ;
水 180 kg/m3； Water 180 kg/m 3 ;
高效减水剂 9 kg/m3； Superplasticizer 9 kg/m 3 ;
所述镁水泥轻骨料混凝土的干表观密度为1870kg/m3。 The dry apparent density of the magnesium cement lightweight aggregate concrete is 1870kg/m 3 .
所述镁水泥由磷酸二氢钾、重烧镁粉和硼砂组成；其中磷酸二氢钾的用量为混凝土质量的9%、重烧镁粉的用量为混凝土质量的27%、硼砂的用量为混凝土质量的1%。 Described magnesium cement is made up of potassium dihydrogen phosphate, dead-burned magnesium powder and borax; Wherein the consumption of potassium dihydrogen phosphate is 9% of concrete quality, the consumption of dead-burned magnesium powder is 27% of concrete quality, the consumption of borax is concrete 1% of mass.
所述轻骨料的组成成分为页岩陶粒。 The composition of the lightweight aggregate is shale ceramsite.
实施例2Example 2
一种镁水泥轻骨料混凝土空心箱板是由镁水泥轻骨料混凝土、钢筋和轻质复合箱体组成；即将钢筋按模板绑扎好，在其中放入轻质复合箱体，浇注镁水泥轻骨料混凝土使其成型后拆模制成。 A magnesium cement lightweight aggregate concrete hollow box slab is composed of magnesium cement lightweight aggregate concrete, steel bars and lightweight composite boxes; Aggregate concrete is formed and then demoulded.
所述镁水泥轻骨料混凝土中各组分及其用量为： Each component and consumption thereof are in the described magnesium cement lightweight aggregate concrete:
镁水泥 450 kg/m3； Magnesium cement 450 kg/m 3 ;
砂 650 kg/m3； Sand 650 kg/m 3 ;
轻骨料 500 kg/m3； Light aggregate 500 kg/m 3 ;
水 150 kg/m3； Water 150 kg/m 3 ;
高效减水剂 8 kg/m3； Superplasticizer 8 kg/m 3 ;
所述镁水泥轻骨料混凝土的干表观密度为1800kg/m3。 The dry apparent density of the magnesium cement lightweight aggregate concrete is 1800kg/m 3 .
所述镁水泥由磷酸二氢钾、重烧镁粉和硼砂组成；其中磷酸二氢钾的用量为混凝土质量的8%、重烧镁粉的用量为混凝土质量的24%、硼砂的用量为混凝土质量的0.5%。 Described magnesium cement is made up of potassium dihydrogen phosphate, dead-burned magnesium powder and borax; Wherein the consumption of potassium dihydrogen phosphate is 8% of concrete quality, the consumption of dead-burned magnesium powder is 24% of concrete quality, the consumption of borax is concrete 0.5% of mass.
所述轻骨料为页岩陶粒与粘土陶粒按质量比1:1混合。 The lightweight aggregate is a mixture of shale ceramsite and clay ceramsite at a mass ratio of 1:1.
实施例3Example 3
一种镁水泥轻骨料混凝土空心箱板是由镁水泥轻骨料混凝土、钢筋和轻质复合箱体组成；即将钢筋按模板绑扎好，在其中放入轻质复合箱体，浇注镁水泥轻骨料混凝土使其成型后拆模制成。 A magnesium cement lightweight aggregate concrete hollow box slab is composed of magnesium cement lightweight aggregate concrete, steel bars and lightweight composite boxes; Aggregate concrete is formed and then demoulded.
所述镁水泥轻骨料混凝土中各组分及其用量为： Each component and consumption thereof are in the described magnesium cement lightweight aggregate concrete:
镁水泥 500 kg/m3； Magnesium cement 500 kg/m 3 ;
砂 700 kg/m3； Sand 700 kg/m 3 ;
轻骨料 600 kg/m3； Light aggregate 600 kg/m 3 ;
水 200 kg/m3； Water 200 kg/ m3 ;
高效减水剂 10 kg/m3； Superplasticizer 10 kg/m 3 ;
所述镁水泥轻骨料混凝土的干表观密度为1950kg/m3。 The dry apparent density of the magnesium cement lightweight aggregate concrete is 1950kg/m 3 .
所述镁水泥由磷酸二氢钾、重烧镁粉和硼砂组成；其中磷酸二氢钾的用量为混凝土质量的10%、重烧镁粉的用量为混凝土质量的30%、硼砂的用量为混凝土质量的1.5%。 The magnesium cement is composed of potassium dihydrogen phosphate, dead-burned magnesium powder and borax; wherein the consumption of potassium dihydrogen phosphate is 10% of the concrete quality, the consumption of dead-burned magnesium powder is 30% of the concrete quality, and the consumption of borax is 10% of the concrete quality. 1.5% of mass.
所述轻骨料采用火山渣。 The lightweight aggregate adopts volcanic slag.
本发明镁水泥轻骨料混凝土早凝高强、耐水、耐高温，利用其制备成的镁水泥轻骨料混凝土空心箱板结构隔音和防火性能好，自重小，抗震性能好，可有效增加建筑使用面积，减少工程造价，适用于结构恒载占较大比例的高层建筑、大跨径桥梁和海洋工程等的建设。 The magnesium cement lightweight aggregate concrete of the present invention has high early setting strength, water resistance and high temperature resistance, and the magnesium cement lightweight aggregate concrete hollow box plate structure prepared by using the magnesium cement lightweight aggregate concrete has good sound insulation and fireproof performance, small dead weight and good seismic performance, and can effectively increase the use of buildings. area, reduce engineering cost, and is suitable for the construction of high-rise buildings, long-span bridges and marine engineering where the dead load of the structure accounts for a large proportion.
以上所述仅为本发明的较佳实施例，凡依本发明申请专利范围所做的均等变化与修饰，皆应属本发明的涵盖范围。 The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.
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| CN108301538A (en) * | 2018-03-22 | 2018-07-20 | 吉林长发建筑产业化有限公司 | Filling wall and its construction method under a kind of prefabricated windows |
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Application publication date: 20150107 |