Overview
Granular river sand is a naturally occurring sedimentary material composed of weathered rock particles, primarily quartz, deposited by river currents. Its uniform particle size (typically 0.075–4.75 mm) and rounded edges distinguish it from crushed sand. Sourced from riverbeds or floodplains, it undergoes minimal processing—washing and sieving—to remove organic matter and oversized particles. Globally, river sand accounts for nearly 70% of sand used in construction due to its workability and binding properties. However, unsustainable extraction has led to ecological concerns, prompting stricter regulations and the exploration of alternatives like manufactured sand in some regions.
Physical and Chemical Properties
River sand’s properties are determined by its geological origin. It typically contains 80–95% silica (SiO₂), with traces of feldspar, iron oxides, and other minerals. The grains are smooth and rounded from natural abrasion, enhancing workability in concrete mixes. Its bulk density ranges from 1,400–1,600 kg/m³, and it has a low water absorption rate (<1%). Chemically inert, river sand resists reactions with cement or alkalis, making it stable for long-term construction use. Its permeability (10⁻³–10⁻⁴ cm/s) suits filtration applications. Unlike desert sand, which is overly fine and wind-polished, river sand’s coarser texture provides better mechanical interlocking in composites.
Main Applications
In construction, granular river sand is indispensable for concrete (filling voids between coarse aggregates) and mortar (binding bricks/blocks). Its uniformity ensures structural integrity and reduces shrinkage cracks. Landscapers use it for drainage layers, golf course bunkers, and beach replenishment due to its aesthetic appeal and permeability. Industrially, it serves as a filtration medium in water treatment plants and a substrate in sandblasting (cleaning metal surfaces). Specialty uses include foundry molds (casting metals) and sports field construction. In agriculture, coarse river sand improves soil aeration in clay-heavy substrates.
Safety and Storage
While non-toxic, prolonged inhalation of silica dust from dry river sand can cause silicosis—a serious lung disease. OSHA mandates exposure limits (e.g., 50 μg/m³ over 8 hours in the US). Use wet cutting methods or NIOSH-approved respirators during bulk handling. Store sand in covered piles or silos to prevent wind dispersal and contamination by debris or rainwater. Environmental regulations in many countries now require permits for river sand extraction to protect aquatic ecosystems. Buyers should verify suppliers comply with sustainable mining practices, such as restricted dredging depths and seasonal bans to protect fish spawning grounds.
B2B Procurement Guide
Key procurement criteria include grain size (specify fine, medium, or coarse grades per ASTM C33 standards), clay/silt content (<3% for premium concrete sand), and chloride levels (<0.1% for reinforced concrete). Request lab test reports for silt density index (SDI) if used in filtration. Logistics matter: proximity to the project site reduces costs (shipping heavy bulk sand long distances is uneconomical). For large orders, negotiate volumetric pricing (e.g., per cubic yard). Alternative options like recycled crushed concrete sand may offer cost savings where river sand is scarce or regulated.
Related Manufacturers
- 主营：膨胀袋、砌墙石、鹅卵石、草坪填充河沙、建筑陶粒、防汛沙袋、二灰碎石、生石灰块、无尘海沙、陶土红砖、多孔水泥砖、水处理滤料、混凝土陶粒、镂空水泥砖、零担快运专线、建筑施工石粉、脱硫剂氧化钙、防洪防汛土工袋、园林透水小石硝、水处理用白灰面
- 主营：防汛沙袋、氢氧化钙、铺路鹅卵石、地基回填白灰面
- 主营：石墨粉、石油焦粉、沸石粉、烘干河沙、白沸石、重钙粉、火山石、核桃壳、氧化钙、浮石、膨润土、石油焦增碳剂、莫来石、重晶石粉、煅烧石油焦、木粉、石英砂、鳞片石墨、萤石粉、膨润土球、氢氧化钙、石灰石粉、莫来砂、高岭土、滑石粉、收尘粉
- 主营：石英砂、石英粉、碳酸钙、白云石、白云石粉、砂浆河沙、重钙粉、轻钙粉、白沙、白石子、高岭土、煅烧高岭土、膨润土、氢氧化钙、染色石子、染色彩砂、麦饭石粉、凹凸棒土粉、蛭石粉、滑石粉、氧化钙、珍珠岩、硅藻土、白陶土、火山石、金刚砂、铁钢砂、鹅卵石、沸石粉、重晶石粉、长石、铝矾土
- 主营：砂浆用天然河沙、景观石子、地面基础垫层
- 主营：石英砂、金刚砂、白沙子、滑石粉、白云石、金刚砂地坪材料、膨润土、碳酸钙
- 主营：游乐园、水泥砖、活性炭、河沙、石英砂、无烟煤、水洗砂、金刚砂、景海沙、溶雪剂、玩具沙、干燥剂、白石子、海沙、儿童乐园海沙、儿童海沙、白沙子、果壳活性炭、石英砂滤料、雪花白、北京海沙
- 主营：沙子、水泥、石子块石、粉白灰、白灰、护坡石、水泥管、块白灰、加气块、机制沙、鹅卵石、面包砖、石灰粉块、建筑红砖、黄沙粗砂、碎石石子、红砖仿古、冀东水泥、多孔红砖、水泥井管、粗砂矿沙、水稳碎石、二灰碎石、水泥砖
- 主营：河沙、连砂石、级配碎石
- 主营：轻质碳酸钙、4A沸石粉、膨润土、重晶石粉、配重铁粉 铁砂、氢氧化钙、红陶土 黄陶土、木粉、麦饭石粉、沸石粉、煅烧高岭土、水洗高岭土、滑石粉、负离子粉、硅藻土、白云石粉、玻璃鳞片、高铝耐火粉、蓝晶石粉
- 主营：真石漆、陶瓷球、扩香石、火山石、玻璃砂、暖宝贴、火焰石、莫来砂、花盆土、鹅卵石、填香炉、黑金砂石、建筑石子、碳酸钙粉、机制木炭、保温材料、养花园艺、装饰摆件、金色彩砂、防水地坪、石英砂滤料、石英砂炉料、中频炉胶泥、家装彩石扁珠、中性炉衬材料
- 主营：中华麦饭石、石英砂、火山石
- 主营：磁选机、永磁磁选机、电磁自卸式除铁器、平板磁选机、电磁除铁器
- 主营：覆膜砂、铸造覆膜砂、石英砂、石英粉、重晶石粉、圆粒砂、圆粒石英砂、硅石粉、白色硅微粉
- 主营：建筑陶粒、回填陶粒、陶粒砂、轻质陶粒、陶粒混凝土
- 主营：金刚砂、鹅卵石、石英砂、河沙、染色彩砂、彩砂、水洗砂、烧结彩砂网红砂、金玉明砂、造景砂、雪景砂
- 主营：彩砂、金刚砂、鹅卵石、河沙、石英砂、滑石粉、水磨石、染色彩砂
- 主营：云母、蛭石、轮胎粉、河沙、彩砂、蛭石板、阻火模块、石英砂、无石棉矿物复合纤维、木质纤维、海泡石
- 主营：真石漆、沙子全、腻子粉、40目河沙、烘干河沙、河沙园艺、粘土球、白沙子、烘干沙、膨润土、水族婚庆、抗裂砂浆、钙粉工业、塑料橡胶、喷砂除锈、环氧草坪、人造沙滩、石粉填充、砂浆抹面、钻井泥浆、公园造景、石粉砂浆、石粉沙子、白色沙子、pvc填充料
- 主营：磁选机、永磁铁、除铁器、磁选设备、除铁设备、选矿设备、长方形吸铁石、铁铝分离设备、高效矿选设备、矿山电磁吸铁器、电磁除铁器、自卸式除铁器、电磁磁选机、平板磁选机、滚筒磁选机
- 主营：鱼缸砂、夜光石、路面石、烘干河沙白沙子、火山石、鹅卵石、雨花石、洗米石、水洗石、机制石子、水磨石子、胶粘石、石英砂、烘干砂、保温砂、砂浆砂、金刚砂、白沙子、蛭石、荧光粉、天然彩砂、染色彩砂、金刚砂地坪料、透水石子、水刷石石子
- 主营：彩色石子、彩沙、有机覆盖物、河沙、火山岩、石英砂、彩色玻璃砂、蛭石、岩片、钙粉、鹅卵石、膨润土、粉煤灰、铝矾土、油田堵漏剂、高岭土、木粉、石膏粉、珍珠岩、陶粒、金刚砂
- 主营：变压器鹅卵石、石英砂、火山石、彩色石子、鹅卵石滤料、夜光石、黑色金刚砂、黑色砾石、白色石子、地坪五彩石、烘干砂、贝壳粉、重钙粉、轻钙粉、石英粉、滑石粉、煅烧高岭土、水洗石、水磨石子
- 主营：云母粉、蛭石粉、膨润土、河沙、硅藻土、电气石、云母片、麦饭石、石英砂、重晶石、sio2焊条、发热铁砂、耐火漂珠、煅烧沸石、防火涂料、膨胀蛭石、空心漂珠、涂料彩砂、生蛭石片、白色蛭石、实木木粉、染色彩砂、火山熔岩、晶体电介质、滤料鹅卵石、生物质燃料
- 主营：岩片、染色岩片、蛭石、粗河沙、云母、石英砂、雨花石、染色云母、机制炭、烧烤炭、白云石、石子、五彩石