Winter operational and maintenance best management practices (BMPs) for permeable interlocking concrete pavers (PICP)

透水性联锁混凝土摊铺机是一种可持续的路面系统，用于现场渗透和处理雨水。作为传统沥青路面的替代产品，PICP是一项有助于减少城市洪水和污染的重要技术。作为一种路面和雨水系统，PICP需要不同于传统不透水路面的操作和维护做法。在加拿大，由于缺乏经过验证的操作实践和维护解决方案来支持路面的长期功能，PICP在商业、机构和住宅应用中的采用受到了严重阻碍。该项目汇集了三个行业合作伙伴和一个监管机构。合作伙伴包括连锁混凝土路面研究所(ICPI)、布拉普顿砖、加拿大拉法基和多伦多和地区保护局(TRCA)。拟议的研究将调查两种操作情景下有前景的最佳管理做法：(1)冬季操作和(2)水力复壮。在冬季，PICP面上融化的雪和冰渗入下面的底基，防止黑色冰在表面形成。因此，PICP面将需要不同(或可能更少)的除冰用量，而不是传统沥青。这项研究将验证这一假设，并确定典型的PICP路面所需的除冰/防冰的类型和数量。多年来，由于沉积物的积累堵塞了路面，PICP面失去了渗透能力。目前行业推荐的维护做法(真空清扫)对大多数PICP所有者来说并不实用，也没有提供可接受的修复水平。如果不加以处理，缺乏可行和有效的维护方案可能会阻碍加拿大社区使用PICP进行雨水管理。这项研究的后半部分将测试前处理实践的有效性，以最大限度地提高水力恢复能力。这项工作的目标是为加拿大的PICP业制定定制的操作和维护最佳管理做法(BMP)。

Permeable interlocking concrete pavers (PICP) are a sustainable pavement system for on-site infiltration and treatment of stormwater. As an alternative product to traditional asphalt pavements PICP is an important technology that can help reduce urban flooding and pollution. As a pavement and stormwater system PICP requires different operational and maintenance practices than traditional impermeable pavements. In Canada, the adoption of PICP for commercial, institutional and residential application is significantly hindered by a lack of proven operational practices and maintenance solutions to support long term functionality of the pavement. This project brings together three industrial partners and one regulatory body. Partners include the Interlocking Concrete Pavement Institute (ICPI), Brampton Brick, Lafarge Canada and the Toronto and Region Conservation Authority (TRCA). The proposed research will investigate promising best management practices for two operational scenarios: (1) winter operations and (2) hydraulic rejuvenation. During the winter melted snow and ice on a PICP surface infiltrates to underlying subbase preventing black ice from forming on the surface. As a result, PICP surface will require different (and possibly less) de-icing application rates than conventional asphalt. This study will test this hypothesis and determine the type and amount of de-icing/anti-icing required for a typical PICP pavement. Over the years a PICP surface loses infiltration capacity as sediments accumulate clogging the pavement surface. Current recommended maintenance practices by industry (vacuum sweeping) are not practical for most PICP owners and do not provide an acceptable level of restoration. If left unadressed, the lack of feasible and effective maintenance options will likely prevent the use of PICP for stormwater management in Canadian communities. The second half of this study will test the effectiveness of pre-treatment practices to maximize hydraulic rejuvenation. The goal of this work is to develop customized operational and maintenance best management practices (BMPs) for the PICP industry in Canada.