Abstract
Joint sealant is affected by various environmental factors in service, such as different temperatures, water soaking, ultraviolet and so on. In this paper, the VAE emulsion–cement compositejoint sealant was pretreated under multiple simulation environments. Thereafter, the degradation rules of fixed elongation and tensile properties of joint sealants at different mix proportions were systemically investigated under the action of external environments (temperature, water soaking and ultraviolet), and the influence mechanisms of diverse environmental factors were analyzed. The research results suggested that, under the action of external environments, the VAE emulsion–cement composite joint sealants exhibited degradation effects to varying degrees. After the addition of plasticizer, the joint sealants had reduced cohesion strength in low temperature environment and enhanced flexible deformability. The addition of water repellent improved the water resistance of joint sealants. Meanwhile, adding ultraviolet shield agent partially improved the ultraviolet radiation aging resistance. A greater powder–liquid ratio led to the lower flexibility of joint sealants, but superior water resistance and ultraviolet radiation aging resistance.
Highlights
Airfield pavement joint sealants are used to connect the airport pavement slabs
The most commonly used pavement joint sealants are polymer materials, such as polyurethane, polysulfide and silicone [2,3,4,5]. Such materials have superior deformation performances and bonding properties and are convenient for construction. These polymer joint sealants are affected in service by different environmental factors, resulting in strength reduction and adhesion decline of joint sealants
This study investigated the fixed elongation and tensile properties of the VAE emulsion–cement composite joint sealant under different environments
Summary
Airfield pavement joint sealants are used to connect the airport pavement slabs. the properties of sealing joint materials used at seams and the achieved joint sealing effect directly affect the usability of the airfield pavement [1]. The most commonly used pavement joint sealants are polymer materials, such as polyurethane, polysulfide and silicone [2,3,4,5] Such materials have superior deformation performances and bonding properties and are convenient for construction. These polymer joint sealants are affected in service by different environmental factors, resulting in strength reduction and adhesion decline of joint sealants. This caninduce the phenomena of airfield pavementpumping and faulting of slab ends, affecting the normal use of the pavement [6,7]. Chen et al [8]
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