Overview
Lime plaster for exterior walls is a time-tested construction material composed of slaked lime (calcium hydroxide), sand, and water. Unlike modern cement-based plasters, it hardens through carbonation, absorbing CO₂ from the air to form calcium carbonate. This process gives it unique properties like breathability and flexibility, making it ideal for historic preservation and green building projects. Traditionally used since ancient times, lime plaster is experiencing a revival due to its sustainability advantages. It is fully recyclable, requires less energy to produce than cement, and improves indoor air quality by regulating humidity. Modern formulations may include natural additives like hemp or pozzolans to enhance performance.
Physical and Chemical Properties
Lime plaster’s key physical properties include high vapor permeability (allowing walls to ‘breathe’), low tensile strength (preventing cracking in flexible substrates), and a slow curing time (enabling reworking). Its pH of 12–13 provides natural resistance to mold and bacteria. Chemically, the carbonation process converts Ca(OH)₂ to CaCO₃ over months or years, gradually increasing hardness. Unlike cement, lime plaster remains slightly soluble, allowing autogenous healing of microcracks. The sand filler (typically 2.5–3 parts to 1 part lime) determines workability and texture, with well-graded angular sands preferred for durability.
Main Applications
The primary use of exterior lime plaster is in restoring historic masonry buildings, where its compatibility with soft substrates like brick or stone prevents damage. It’s also specified for new eco-construction projects seeking materials with low embodied carbon. Specialized applications include fresco work (for its smooth finish), damp-prone climates (moisture regulation), and seismic zones (flexibility accommodates movement). Contemporary blends with insulating aggregates (e.g., perlite) are used in passive house designs. In conservation, NHL (natural hydraulic lime) grades are chosen based on substrate strength.
Safety and Storage
Fresh lime plaster is caustic (pH 12–13), requiring PPE like gloves and goggles during application. Dust from dry powder should be avoided—wet mixing suppresses airborne particles. Cured plaster poses no health risks. Storage demands careful sealing to prevent premature carbonation. Bulk lime putty can be stored underwater indefinitely. Bagged hydrated lime must be kept dry and used within 6 months. Never store near acids or fertilizers, as reactions may release toxic gases. Dispose of waste material at pH-neutral landfills.
B2B Procurement Guide
For bulk purchases, verify lime purity (CL90 for non-hydraulic, NHL 2–5 for hydraulic). Reputable suppliers provide test certificates for free lime content and unreacted oxides. Sand should be washed, well-graded, and locally sourced to match historic textures. Pricing depends on volume, with discounts for 25+ ton orders. Transport costs are significant due to weight—consider regional suppliers. Lead times may extend to 4 weeks for custom mixes. Specify packaging (big bags vs. pallets) based on site logistics. Sample testing for workability and color matching is recommended before full procurement.
Related Manufacturers
- 主营：幕墙安装、幕墙改造、幕墙加固、外墙翻新、幕墙玻璃更换、幕墙玻璃改色、幕墙玻璃维修
- 主营：防腐材料、保温材料、隔音减震涂料、外墙保温涂料价格、防水材料、隔热材料、工业保温i涂料
- 主营：隔热防水涂料、保温涂料、防腐涂料、外墙保温凝胶、防锈漆、路桥防水、各种家装防水、各种工程防水
- 主营：污水池、水泥基、隔热涂料、无机保温膏料、保温涂料、渗透结晶、吸音隔音、吸音涂料、防水涂料、丙烯酸防水、耐高温防水、耐酸耐碱耐、一体防腐涂料、防水防腐涂料、玻璃微珠保温、水性纳米中空、吸音阻燃涂料、彩钢防腐防锈、弹性防护涂料、水性环保涂料、液体卷材施工、液体卷材防水、胶乳防水砂浆、防腐防水材料、复合防腐涂料
- 主营：珍珠岩、蛭石、石英砂、氧化钙生石灰、氢氧化钙熟石灰、滑石粉、碳酸钙、膨润土、高岭土、铝矾土、木粉、夜光石、陶瓷球、陶瓷砂、玻璃砂、云母岩片、氧化铁、金刚砂、生物质颗粒、橡胶颗粒、喷涂棉、白云石
- 主营：门窗胶、填缝剂、美缝胶、密封胶、聚氨酯发泡胶、玻璃胶、耐候胶、高弹胶、发泡胶、固化胶、结构胶、门窗填缝、中性硅酮胶、门窗工程胶、门窗泡沫剂、免钉胶、快干玻璃胶、中性硅酮结构胶、防水结构胶
- 主营：软化剂、补钙剂、无机碱、环保石灰、工业级石灰、环保消石灰、环保熟石灰、灌装散装石灰粉、土壤改良生石灰、密封包装、食品添加剂、环保氧化钙、灰氢氧化钙、环保氢氧化钙、高纯度氢氧化钙
- 主营：伸缩缝、止水带、网架支座、填缝密封膏、桥梁支座、伸缩装置、球形支座、球铰支座、橡胶支座、聚硫密封胶、抗震铰支座、滑动铰支座、分散力支座、桥梁伸缩缝、桥梁支座更换、160型伸缩缝、桥梁伸缩缝维修与更换、双组份聚氨酯密封胶、单组份聚氨酯密封胶、板式橡胶支座、盆式橡胶支座、双向滑动支座
- 主营：堵漏王、降噪涂料、防腐涂料、外墙保温系统、聚氨酯密封膏、防水涂料、防水粘结剂、隔声一体化、多功能涂料、防水添加剂、保温绝热涂料、保温隔热涂料、聚氨酯填缝料、液体防水卷材、保温隔热材料、反射隔热涂料、防水防潮涂料、改性水泥乳液、防潮防渗材料、微珠保温材料、防火绝热涂料、桥面防水材料、盈速粒隔热涂料
- 主营：新型建筑节能保温涂料、防腐涂料、防水材料、外墙保温涂料、道桥防水材料、隔音环保涂料、游泳池、地坪漆、防水浆料、防水涂料、泡沫塑料、瓷砖家用固胶、强瓷砖粘结剂、改性沥青涂料、纳米气凝胶涂料、设备漆、防锈涂料、隔热涂料
- 主营：修补料、修复剂、养护材料、裂缝处理、密封材料、修补材料、保温地坪、修补砂浆、道路修补剂、空鼓处理剂、桥梁抢修料、裂缝密封胶、渗透固化剂、裂缝修补剂、混凝土裂缝、薄层修复料、地下室楼板、裂缝修复胶、磨损处理剂、地坪修补胶、坑洞修复料、地坪灌缝胶、水池水泥地坪、高强度混凝土、砂浆修复材料
- 主营：稀土保温涂料、硅酸镁保温涂料、海泡石保温涂料、外墙无机保温砂浆、稀土保温材料、GSY新型保温材料、保温砂浆、玻化微珠保温砂浆、聚苯颗粒保温砂浆、建筑保温砂浆、微化微珠保温砂浆、高温稀土抹面料、FBT稀土保温涂料、硅酸盐保温涂料
- 主营：文化石、碎拼石、垒墙石、外墙石、庭院石材、黄木纹板岩、蘑菇石、片石冰裂纹、天然石材、青石板、自然面片石、浆砌片石、仿古石、网贴石、六角砖
- 主营：综合体、肌理板、艺术椅、外墙装饰透光水泥板、休闲椅、水泥坐凳、景观坐凳、艺术树池、沙发边几、建筑材料、景观座椅、艺术家具、条形坐凳、水泥花盆、摆件定制、休闲座椅、家具摆件、公园坐凳、花坛坐凳、水泥茶几、异形座椅、艺术坐凳、装饰坐凳、成品坐凳、装饰墙板、花坛座椅
- 主营：油烟清洗、定制清洗、开荒清洁、外墙清洗、开荒保洁、驻场保洁、清洗方案、玻璃清洗、保洁托管、烟管清洗、烟罩设备清洗、风道检测服务、风道检测清洗、超洁清洗管道、化粪池疏通、办公室保洁
- 主营：石灰石、文化石、精装墙砖