Steel slag (SS) as aggregate has excellent mechanical properties and rich surface morphology. However, its high water absorption subsequent volume expansion are the main problems in application of steel slag. Therefore, this work compares treatment effects cement paste (CP), silane coupling agent (SCA), polyvinyl alcohol (PVA) epoxy acrylic organic-silicone resin (EAOR) on The micro morphology before after was evaluated by environmental scanning electron microscope (ESEM) Matlab modeling....

In recent years, there has been an increasing interest in steel slag asphalt mixtures. Steel good mechanical properties, but is a risk of leaching heavy metal elements during the stockpiling process and after paving pavement. Therefore, this work firstly investigated effect different influencing factors on concentration analyzed mechanism by microstructure. Then, gray relational analysis method was adopted to compare magnitude effects type, grade binder content temperature mixes. The results...

In recent years, there has been an increasing interest in waste fiber reinforced asphalt mixes. Waste betel nut (BNF) can improve the tensile strength of mixture, while hydrophilic groups on its surface reduce water stability. Therefore, this study investigated effect alkali-treated BNF stability performance mixtures. The effects shear time, content, and aggregate ratio BNF-enhanced mixtures were separately by response methodology (RSM). road RSM method with optimal solution without fiber,...

The objective of this study was to explore the engineering application potential waste cigarette butts and investigate effect cellulose acetate (WCA) as reinforcement material on performance asphalt mixtures. A prediction model also constructed optimal mixture preparation scheme. In study, a scanning electron microscope (SEM) used visually characterize surface morphology WCA. elemental composition determined semiquantitatively using an energy dispersive spectrometer (EDS). experimental...

By reutilizing industrial byproducts, inorganic cementitious alkali-activated materials (AAMs) contribute to reduced energy consumption and carbon dioxide (CO2) emissions. In this study, coal gangue (CG) blended with ground granulated blast furnace slag (GGBFS) was used prepare AAMs. The research focused on analyzing the effects of GGBFS content alkali activator (i.e., Na2O mass ratio modulus [SiO2/Na2O]) mechanical properties microstructures Through a series spectroscopic microscopic tests,...

Diatomite, a natural adsorbent rich in active silica, serves as valuable precursor for geopolymer synthesis. The safe disposal of diatomite failed lead (Pb(II)) is critical to prevent secondary contamination. This study investigated the immobilisation efficiency geopolymerisation Pb(II)-rich sludge. Low-grade with high ignition loss was utilised synthesis alkali-activated geopolymers. It demonstrated that geopolymers achieved compressive strength 28.3 MPa 50% replacement rate metakaolin by...

This study explores the potential of biosilica including diatom and diatomaceous earth as alternative silica sources for metakaolin-based geopolymers. Diatomaceous earth, composed fossilised frustules rich in amorphous silica, diatoms, a sustainable source renewable biosilica, are investigated their effectiveness enhancing geopolymer properties. Through detailed analyses FTIR, XRD, SEM, evaluates impact these on compressive strength microstructure, comparing them with conventional sodium...

After operating for 11,640 h, a boiler failed due to multiple cracks generated in the inner wall of outlet header reheater. A thorough analysis was conducted this work, including evidence and specimen collection, chemical composition analysis, tensile impact test metallographic energy dispersive spectroscopy (EDS) electron backscattering diffraction (EBSD) characterisation, reveal causes The strength-Rm average micro-Vickers hardness is 496 MPa 168 HV, respectively. Besides, microstructure...

The high-pressure flash pipeline of coal coke gasification leaked within one week after the operation. Further macroscopic observation showed that cracks appeared in base material area near weld. medium transported by pipe was low-concentration acid gas. Visual inspection, tensile testing, impact chemical composition analysis, metallographic energy dispersive spectroscopy, X-ray diffraction and electron backscattering analysis were used to reveal sources pipeline. It found intergranular...

Abstract During the water pressure test of waste heat boiler heavy metal recovery unit, many leaks were found in superheater tube bundle. These all concentrated at simmering bend location parent material. This prompted an investigation into causes cracks tubes boiler. The study followed a systematic approach, starting with macroscopic examination samples, nondestructive radiography, quality examination, chemical composition analysis, metallographic scanning electron microscopy and energy...

Abstract A petrochemical company’s pipeline ruptured in the flowmeter bypass of main steam during a blowdown before commissioning, resulting material failure and inoperability. The cause pipe rupture needed to be detected experimentally. To study rupture, visual inspection, mechanical properties testing, chemical composition analysis, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) Mechanical property. experiments confirmed reason for 15CrMoG...

Waste tire pyrolysis has the advantages of economy, environmental protection, and high energy conversion rate; however, there is little research on application carbon black (PCB), which accounts for a percentage products, in asphalt mixtures. The objectives this study were to investigate effect PCB ash physical properties binders, coupling treatment dispersibility PCB-modified asphalt, mixing process road co-pyrolytic (CPCB) low-temperature vacuum pyrolytic (VPCB) blended with 70# base...

Sorona ® EP poly(trimethylene terephthalate) (PTT) is an engineering thermoplastic resin that contains 37% bio-based content derived from its 1,3-propanediol monomer and a commercially successful product for fiber injection molding applications. This contribution describes the development of PTT formulations extruded tubes. compositions containing glass (GF) reinforcement reactive impact modifier were formulated to produce tubes with 63- 110-mm outer diameters 5- 10-mm wall thicknesses....