OBJECTIVE To assess microleakage in conservative class V cavities prepared with aluminum-oxide air abrasion or turbine and restored with self-etching or etch-and-rinse adhesive systems. MATERIALS AND METHODS Forty premolars were randomly assigned to 4 groups (I and II: air abrasion; III and IV: turbine) and class V cavities were prepared on the buccal surfaces. Conditioning approaches were: g...

[1] In actively eroding landscapes, fluvial abrasion modifies the characteristics of the sediment carried by rivers and consequently has a direct impact on the ability of mountain rivers to erode their bedrock and on the characteristics and volume of the sediment exported from upland catchments. In this experimental study, we use a novel flume replicating hydrodynamic conditions prevailing in m...

Through penetration depth tests, capillary water absorption tests under different abrasion depths, and of a cement mortar test block with crack damage, self-prepared, novel, graphene oxide/silane composite emulsion used for the effect wear or cracking damage was studied. The waterproof performance concrete protective mechanism verified by scanning electron microscopy, X-ray diffraction, thermog...

The application of asphalt hot mix recycling is one challenge in sustainable road pavement research. In addition to the vast amount research on performance recycled asphalt–concrete, frictional resistance still limited. effects aged and aggregates skid were investigated this carefully extracted from field-reclaimed pavement, engineering mechanical properties virgin measured. degradation was sim...

The location estuary of the Bogowonto river is very strategic because it on west side YIA airport (Yogyakarta International Airport). condition will directly affect airport, especially related to flood conditions. construction an necessary maintain sediment transport so that buildup does not occur flooding. One constructions at prevent this a jetty. use jetty constituent elements can withstand ...

Although the use of concrete and reinforced for construction has been widespread, more studies are needed on marine structures exposed directly to corrosive environments prolong their service life. This paper proposes a new type shell precast block coastal structures, studying beam consisting 15mm High-Performance Glass Fiber-Reinforced Concrete (HPGFRC) at bottom 45mm Traditional (TC) rest str...

BACKGROUND This study evaluated the effect of air-particle abrasion with different particle sizes on the surface roughness and phase transformation of yttria-stabilized tetragonal zirconia ceramics (Y-TZP). METHODS Eighty-four Y-TZP discs of 15 mm diameter and 1.0 mm thickness were fabricated. The samples were divided into four groups (n = 21): (1) air-particle abrasion with 30 μm CoJet sand ...