Overview
Central buried waterstops are flexible strips installed within concrete joints to form a watertight seal. They are essential in infrastructure projects where water infiltration could compromise structural integrity or safety. Designed to withstand hydrostatic pressure, these waterstops accommodate minor movements caused by settlement or thermal expansion. Common materials include rubber (EPDM for weather resistance, NBR for oil exposure), PVC for cost-effectiveness, and metal-reinforced variants for high-load scenarios. The 'central buried' design refers to their placement mid-thickness in concrete pours, ensuring equal protection on both sides of the joint.
Structure and Working Principle
A typical central buried waterstop features a flat or ribbed profile with embedded anchoring fins to enhance bonding with concrete. Some designs incorporate hollow channels that swell upon water contact for self-sealing. The working principle relies on the material's impermeability and adhesion to concrete, creating a continuous barrier. For expansion joints, waterstops may include accordion-like middle sections to absorb movement. Metal-reinforced types use stainless steel plates to resist tearing under stress. Proper installation requires precise alignment and protection from damage during concrete pouring.
Key Features
1. Material versatility: Options like EPDM (for ozone/UV resistance) or NBR (for oil/fuel exposure) cater to specific environments. 2. Movement accommodation: Can stretch up to 300% (rubber types) to handle joint displacement. 3. Longevity: Resistant to aging, chemicals, and microbial growth. Metal-reinforced variants offer exceptional tensile strength (up to 15 MPa), while PVC versions provide affordability for less demanding applications. Some products include hydrophilic coatings that activate upon water contact, expanding to fill gaps.
Application Areas
Primary applications include: 1. Underground structures (subways, parking garages) where groundwater infiltration is a risk. 2. Water containment facilities (reservoirs, sewage tanks). 3. Transportation infrastructure (bridge joints, tunnel segments). In seismic zones, waterstops with high elongation properties are critical to maintain seals during earth movements. They are also used in precast concrete systems, where joints between modular components require reliable waterproofing.
Maintenance and Precautions
Pre-installation: Store rolls vertically in shaded, dry areas to prevent deformation. Avoid dragging during handling to prevent surface scratches. During installation: Ensure concrete surfaces are clean and roughened for better adhesion. Use formwork supports to maintain positioning. Post-installation: Inspect for gaps or misalignment before concrete pouring. For repairs, specialized sealants compatible with the waterstop material can address minor leaks. Avoid welding near PVC waterstops to prevent thermal damage.
B2B Procurement Guide
When sourcing central buried waterstops, prioritize suppliers with: 1. Certifications like ISO 9001 and product-specific tests (e.g., GB 18173.2 for Chinese standards). 2. Customization capabilities for non-standard joint designs. 3. Technical support for installation guidance. Bulk orders typically reduce costs by 10–20%. For large projects, consider factory audits to verify production quality. MOQs commonly range from 500–2,000 meters, with lead times of 2–4 weeks. Always request material test reports (MTRs) for chemical and physical properties.
Related Manufacturers
- 主营：止水条、制品型止水条、密封胶、钢板腻子止水带、橡胶止水带、单组份聚氨酯密封胶、双组份聚氨酯密封胶、双组份聚硫密封胶、遇水膨胀止水条、接缝防水胶、闭孔泡沫板、防水密封胶条、聚氨酯密封胶、双面自粘薄片、防水补漏自粘片、遇水膨胀橡胶条、遇水膨胀止水胶、丁基腻子橡胶自粘薄片、橡胶制品专用粘合剂、柔性填料、膨胀止水环、盾构粘合剂
- 主营：[]
- 主营：[]
- 主营：板式橡胶支座、隔震支座、遇水膨胀止水条、橡胶止水带、密封胶、桥梁伸缩缝
- 主营：[]
- 主营：止水带、桥梁伸缩缝、桥梁伸缩装置
- 主营：[]
- 主营：尼龙件、塑料件、尼龙制品、橡胶止水带、塑料配件、尼龙异形件、橡胶密封件、注塑加工件、橡胶密封垫片、外壳塑料定制件、自润滑工程配件、高强度耐磨塑料
- 主营：灌浆塞、注浆塞、封孔器、止水带、高压胶管
- 主营：橡胶止水带、遇水膨胀止水条
- 主营：遇水膨胀止水条、SR塑性填料、三元乙丙橡胶防渗复合盖片、橡胶止水带、板式橡胶支座
- 主营：密封胶、膨胀止水环、闭孔泡沫板、钢板止水带、黑色实心减震棒、遇水膨胀止水胶、遇水膨胀止水条
- 主营：纤维棉、保温隔声材料、复合防水卷材、止水带、保温隔声卷材、聚乙烯复合卷材
- 主营：球饺支座、橡胶垫块、橡胶隔震支座、橡胶止水带、抗震滚轴支座
- 主营：预应力塑料波纹管、桥梁预应力波纹管、波纹管、止水带、金属螺旋管、双臂波纹管、金属管、透水管、内衬管、碳素波纹管、泡沫芯膜、塑料扁管、一次性芯膜、桥梁穿线管、桥梁伸缩缝、预应力锚具、透水盲沟管、张拉力锚具、桥梁张拉锚具、金属波纹圆管、桥梁填充内模、一次性泡沫芯模、预埋地脚螺栓波纹管
- 主营：651型止水带、伸缩缝、橡胶支座
- 主营：止水钢板、镀锌止水板、不锈钢止水钢板、橡胶止水带、穿墙螺杆
- 主营：桥梁伸缩缝、模数式伸缩缝、梳齿板伸缩缝、橡胶止水带、橡胶支座、板式橡胶支座、盆式支座、球型支座
- 主营：启闭机、捞渣机、排污机、橡胶止水带、清污机、拦污栅、铸铁闸门、排水管道、电动装置、水利设备、污水管道、市政管道、翻版闸门、液压钢坝、一体闸门、钢坝翻板、防锈机闸、铸铁拍门、玻璃钢拍门、单向止水闸、远程升降钢坝、污水调节堰门、渠道钢制闸门、暗杆式钢制闸门、潜孔式钢制闸门
- 主营：紫铜片、止水铜片、紫铜止水片、橡胶止水带、抗裂纤维、聚丙烯纤维、聚乙烯醇纤维、沥青木丝板、沥青木板、沥青杉木板、沥青杉板、沥青木屑板、沥青麻绳、沥青麻丝、沥青麻筋、沥青麻絮、沥青麻布
- 主营：桥梁支座、建筑钢结构球型支座、球铰支座、止水带、盆式支座、桥梁伸缩装置、钢结构支座、橡胶支座、桥梁伸缩缝、橡胶垫块、球形支座、板式橡胶支座、抗震球型支座、弹性钢支座、球型钢支座、盆式橡胶支座、密封胶、网架支座
- 主营：橡胶支座、盆式橡胶支座、球形支座、橡胶止水带、桥梁伸缩缝、连廊钢支座、橡胶气囊、单组份聚氨酯密封胶、双组份聚硫密封胶、遇水膨胀止水胶、遇水膨胀止水条
- 主营：遇水膨胀止水条、双组份聚硫密封胶、聚氨酯密封胶、橡胶止水带、塑料止水带、橡胶止水环、GB柔性填料、SR防渗盖片