Overview

Introduction

The Fourth ASTM International Symposium on Durability of Building and Construction Sealants and Adhesives (2011-DBCSA) was held on June 16­17, 2011 in Anaheim, California. It was sponsored by the ASTM Internation­al Committee C24 on Building Seals and Sealants in cooperation with the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM). The symposium was held in conjunction with the standardization meetings of the C24 Committee. With presenta­tions from authors representing nine countries in North and South America, Europe, Asia, and Australia, the symposium was a truly international event.

As in the previous events of this symposium series, the 2011 symposium brought together architects, engineers, scientists – researchers and practi­tioners. One of the stated goals of the symposium was to transfer new ideas, gained from laboratory research and field work, to the study of sealant and adhesive durability and the development of new products and test meth­ods. The symposium provided an excellent forum for international experts to share and compare their experiences, network with their peers, and exchange best practices with regard to the durability testing and assessment of build­ing and construction sealants and adhesives. It also provided a platform for an expert panel discussion. The panel discussion was originally conceived as a discussion on sealant warranty issues, but became a spirited conversa­tion regarding the impact of the newly developed ASTM C1736 Standard Practice with participation by the panelists, ASTM C24 members, as well as presenters and participants of the international symposium. Perhaps the greatest value of this series of symposia lies in the discussions occurring during these events and in the utilization of the resulting information.

The current series of ASTM symposia on Durability of Building and Con­struction Sealants and Adhesives is a continuation of tri-annual symposia which were inaugurated by the RILEM Technical Committee 139-DBS Durability of Building Sealants in 1994. Today, this continuing series of symposia provides the best scientific forum globally in the building and con­struction industry for peer-reviewed papers on all aspects of sealant and adhesive durability. Furthermore, data presented at those symposia over the past 17 years have been the single most important factor influencing ASTM International and ISO standards as well as RILEM technical recommenda­tions related to construction sealant durability.

In several languages, such as Dutch, Finnish, Romanian or French, sustainable is translated as durable. This synonymous use of durable and sustainable is not surprising, as durability plays a key role in achieving

sustainable construction, because “one way of extending resource productiv­ity is by extending the useful life of products” (DeSimone & Poppof, 1998). The increased utilization of sustainable construction practice, i. e., design­ing for durability by utilizing building science and life cycle analysis as its foundation, as well as mandatory government regulations, such as the Euro­pean Construction Products Directive, have elevated the importance of the durability and service life performance of building and construction seal­ants and adhesives. All products, not just those involved in safety-critical applications, must demonstrate durability as part of their fitness for purpose assessment. Life cycle costing considerations increasingly drive investment decisions towards products and systems with longer service life cycles and lower maintenance costs.

Against a background of national and international efforts to harmonize testing and approval of building materials and structures, ASTM Interna­tional and RILEM have been looking for ways of bringing together the expe­rience of international experts active in the application and testing of build­ing and construction sealants and adhesives.

As with most scientific disciplines, substantial advances often occur through a series of incremental steps, each contributing pieces of the puzzle, rather than in giant leaps. This is also the case for the papers presented at the Fourth International Symposium on Durability of Building and Con­struction Sealants and Adhesives (2011-DBCSA). Many of the papers reflect progress reports on on-going research. At the 2011-DBCSA symposium, we saw several examples of the steady progress being made by leveraging these scientific advances into a new generation of test methods as well as assess­ment practices.

This book contains twenty-three of the twenty-seven papers presented at the symposium as well as two papers submitted only for publication in the proceedings. It also contains an editorial summary of the panel discussion. The contributions condensed in this STP volume represent state-of-the-art research into sealant and adhesive durability and reflect the varying back­ground, experience, profession, and geographic location of the authors. The following major themes are evident in this collection:

• Laboratory Testing and Specialized Outdoor Exposure Testing

• Factors Influencing the Durability of Sealed Joints and Adhesive Fixing

• Development of New Test Methods and Performance-Based Specifica­tions

• Field Experience with Sealed Joints and Adhesive Fixing

• Performance under Seismic Loads