Increment In Strength Research Articles

Performance of bacterial mediated mineralization in concrete under carbonation and chloride induced corrosion

Prevention of concrete structures from early deterioration under aggressive environments is a major challenge. The present study investigated the performance of bacterial-treated concrete structures under harsh conditions such as carbonation and chloride exposure. Improvement in the mechanical strength and reduction in penetration properties was recorded in bacterial-treated specimens. The maximum carbonation depth of 18.27 mm and reduction of pH (8.6) were recorded in control specimens during carbonation exposure (5% CO2) for 120 days, whereas significant resistance against CO2 diffusion and much-reduced carbonation depth was observed in BAC specimen (9.28 mm) and BSC (11.13 mm) specimens. Due to accelerated carbonation conditions, further increment in mechanical strength and reduced penetration was observed in control and bacterial treated specimens due to microstructure densification caused by carbonation reaction products. During chloride exposure (5% NaCl) for 120 days, the control specimen showed the initiation of rebar corrosion with Ecorr and Icorr values of −522.2 mV/SCE and 0.34 μA/cm2, respectively. However, bacterial-treated reinforced specimens (BARC and BSRC) significantly resisted the penetration of chloride ions. At the end of chloride exposure, BARC and BSRC specimens showed lower Ecorr values of −203.4 mV/SCE and −301.4 mV/SCE and Icorr values of 0.03 μA/cm2 and 0.02 μA/cm2, respectively. These results suggested that the biogenic treated concrete specimens resisted from the deterioration effects of chloride and carbonation exposure and improved their durability properties.

Lowering thermal expansion of Mg with the enhanced strength by Ca alloying

The influence of Ca on the thermal expansion and mechanical properties of Mg are investigated in the present work. Alloying Ca is demonstrated to noticeably decrease the coefficient of thermal expansion (CTE) within a wide temperature interval and increase the strength of Mg at both as-cast and extruded state. A low CTE of ∼18.6 × 10−6 K−1 in combination with the high compressive yield strength of 262 MPa are achieved within the studied concentration interval. The reduced CTE of Mg–Ca alloys is found to closely correlate with the increased Debye temperature with Ca, which primarily emerges from the increased precipitation of Mg2Ca phase showing the relatively high melting point, elastic/shear moduli and low CTE. Similarly, the increased fraction of the eutectic lamellar structure consisting of Mg2Ca and α-Mg dominates the noticeable increase of strength of the as-cast Mg–Ca alloys. The lamellar structure is broken into fine particles dispersing in the matrix at extruded state, which in combination with the refined microstructure yields the dominated contribution to the increment of strength. The low thermal expansion and high strength achieved in the designed Mg–Ca alloys provide a feasible route for the development of advanced Mg alloys.

Life cycle assessment (LCA) of polypropylene fibers (PPF) on mechanical, durability, and microstructural efficiency of concrete incorporating electronic waste aggregates

Around the globe, natural reserves are depleting consistently. In this undeniable situation, it has become essential to find out substitute resources for the ingredients of cement concrete. To encounter this issue, the present study aims to utilize electronic waste (e-waste) as a substitute source of natural aggregates in the production of concrete. In this experimental-based investigation, shredded e-waste is utilized as a partial replacement of coarse aggregate (CA) in concrete with a constant volume replacement of 30% to study the mechanical, durability, and microstructural features. However, to cope with the poor mechanical efficiency, and brittleness of e-waste concrete, polypropylene fibers (PPF) were utilized in concrete. The testing results show that the mechanical efficiency of concrete was reduced by the replacement of natural CA with e-waste aggregate. Fibrous materials have a better impact on the mechanical efficiency of e-waste concrete. The incorporation of 0.5% dosage of PPF, as by volume fraction, in concrete, resulted in an increment in flexural strength and splitting tensile strength (STS) values of about 42% and 78%, respectively. However, the permeability-based durability parameters (sorptivity coefficient, chloride penetration, and porosity) are inversely influenced by an enhanced dosage of PPF. Scanning electron microscopy (SEM) showed that the incorporation of PPF resulted in improved microstructure while the incorporation of e-waste aggregates led to a weak internal matrix. The significance of this research work is the reduction of elevated consumption of natural resources in concrete production accompanied by the improvement in the efficiency of e-waste aggregate concrete by the incorporation of a suitable dosage of fiber reinforcement to make it more practical and sustainable.

Effects of dispersoid preforming via multistep sintering of oxide dispersion-strengthened CoCrFeMnNi high-entropy alloy

• A newly designed ODS manufacturing process, multi-step sintering process, consisting of a dispersoid preforming heat treatment followed by sintering to achieve the dispersoid refinement in HEA matrix was suggested. • An atypical form of Y 2 O 3 , FCC-Y 2 O 3 , formed adjacent to the dislocation inside the matrix grain during the dispersoid preforming heat treatment of multi-step sintering process with a cube-on-cube orientation relationship with the matrix. • The FCC-Y 2 O 3 formed in the multi-step sintered bulk acts as an effective obstacle to grain boundary and dislocation movement resulting in a microstructure refinement and the increment of mechanical strength. • In the bulk prepared by the conventional ODS manufacturing process, coarsened dispersoids consisting of a complex structured oxide with BCC-Y 2 O 3 as the core were predominantly formed along the grain boundary. • Cr-C-O region with a crystal structure of Cr 23 C 6 formed in the HEA matrix serves as an oxygen-supplying reservoir for dispersoids, promoting coarsening of the dispersoids. Dispersoid formation and microstructural evolution in an oxide dispersion-strengthened CoCrFeMnNi high-entropy alloy (HEA) using a newly designed multistep sintering process are investigated. The proposed multistep sintering consists of a dispersoid preforming heat treatment of as-milled 0.1wt% Y 2 O 3 -CoCrFeMnNi high-entropy alloy powders at 800°C, followed by sintering at 800–1000°C under uniaxial pressure. In the conventional single-step sintered bulk, the coarsened BCC Y 2 O 3 dispersoids mainly form with an incoherent interface with the HEA matrix. In contrast, finer FCC Y 2 O 3 dispersoids, an atypical form of Y 2 O 3 , are formed in the matrix region after multistep sintering. Nucleation of FCC Y 2 O 3 dispersoids is initiated on the favorable facet, the {111} plane of the austenitic matrix, with the formation of a semi-coherent interface with the matrix during the dispersoid preforming heat treatment and it maintains its refined size even after sintering. It is found that dispersoid preforming prior to sintering appears promising to control the finer dispersoid formation and refined grain structure.

The optimization of Cu6Y sourced ODS-Cu: Effect of Y2O3 content

To refine the dispersive Y2O3 particles and to explore the optimum Y2O3 content, reducing the Y2O3 addition from 1.5 wt% to 0.5 wt% for Cu6Y sourced Cu-Y2O3 was investigated. It was found that reducing the Y2O3 addition had little influence on the number density, while reducing the size of the Y2O3 particles. Compared with the Y2O3 addition, the nucleation point is expected to be more important for the number density of the Y2O3 by the in-situ fabrication method. Moreover, reducing the Y2O3 addition indeed thinned the prior particle boundaries with O enrichment and contamination, thereby improving the mechanical performance and thermal conductivity. It was calculated that dispersion strengthening made great a contribution to the increment of the yield strength for ODS-Cu. While, the large particles with contamination on the prior particle boundaries induced the dimples and the premature micro-cracks, deteriorating the tensile performance. Therefore, the performance of Cu6Y sourced ODS-Cu can be improved once further reduces the introduction of contamination and suppresses the growth of MA powders during MA process.

Studies on high-temperature stability and strengthening mechanisms of high/medium-entropy alloys for potential nuclear applications: The case of FeCrV-based alloys

High-temperature stability and strengthening mechanisms of high/medium-entropy alloys (HEAs/MEAs) have been studied for Ti-added FeCrV-based MEAs. Experimental results show that FeCrVTix MEAs can maintain good high-temperature stability in chemical element, phase structure and mechanical property. A mixed-strengthening-mechanism model dominated by precipitation and fine-grain strengthening has been proposed by comparing experimental results and model calculations of the yield strength increments for the FeCrV-based MEAs owing to Ti addition. The calculated strength increments with this mixed-strengthening-mechanism model closely match the series experimental results. The excellent compressive fracture strain in the FeCrVTix MEAs mainly comes from crack tip plasticity, and Ti addition not only enhances compressive strain by grain refinement, but also improves compressive strain by crack deflection and bridging. Based on this strengthening model, the content, size and distribution of precipitates can be designed and controlled to regulate and optimize the mechanical properties of HEAs/MEAs. Therefore, this study provides new approaches and ideas for the design and development of HEAs/MEAs with high strength and good ductility for advanced nuclear energy systems.

Experimental study on pullout behaviour of basalt fiber-reinforced polymers minibar embedded in ultra-high performance seawater sea-sand concrete

Pullout tests were conducted on 150 specimens to characterize the bond behaviours of eco-friendly basalt fiber-reinforced polymer minibars (MB) embedded in ultra-high performance seawater sea-sand concrete (UHP-SSC). The experimental variables comprised surface textures of MB (straight and twisted), constituent contents of crushed seashell (SH), and coarse aggregate (CA) in UHP-SSC. The microstructures and surface morphologies of the UHP-SSC matrix and MB were characterized by low-field nuclear magnetic resonance (LF-NMR) and scanning electron microscopy (SEM). A constitutive model for the pullout load-slip relationships was proposed. Experimental results showed that the increments in the bond strength and energy absorption capability provided by twisted MB were more than twice those provided by straight MB, resulting from the additional mechanical anchorage. The acceptable content of SH in sea sand is less than 5% since it could enhance bond strength by 6%, while significant contents show opposite effects. Incorporating CA decreased the interfacial bond behaviours between MB and UHP-SSC, especially with a high volume fraction exceeding 10%. The microscopic observations and pore structures consisted of the evolution of bond behaviours and clarified the corresponding mechanism. The proposed constitutive model considering SH and CA content fits well with the experimental data with relevant regression coefficients over 0.89.

An investigation on Moringa oleifera fruit (drumstick)‐derived cellulose micro and nanofiber reinforced styrene butadiene rubber composites

AbstractThe current focus in the elastomer industry is to look for biobased or natural filler for various compounds. The reinforcing effect of waste drumstick‐derived cellulose micro and nanofiber in styrene butadiene rubber (SBR) was investigated for the very first time. Cellulose microfibers and nanofibers were isolated from the drumstick fruit peel and characterized using different techniques such as x‐ray diffraction, scanning and transmission electron microscopy, and x‐ray photoelectron spectroscopy. The filler‐polymer interaction in the composites was studied using the bound rubber measurements, which showed that the bound rubber content of the composite increased from 0.5% to 8.1% at 5 phr cellulose nanofiber loading. The tensile strength and modulus of the modified cellulose microfiber‐containing composite were higher than both the unfilled SBR and the raw fiber‐SBR composites. The addition of 5 phr nanofiber to SBR showed a 46% increment of the tensile strength than the control compound. The die swell index of the cellulose fiber reinforced composites came down attesting the better processability of the extrudates. The addition of cellulose fiber also improved the wet skid resistance of the composites as seen from dynamic mechanical thermal analysis. Hence, this work confirms the application of modified drumstick microfibers and nanofibers as sustainable fillers for high‐performance elastomers composites.

Experimental investigation on bond behavior of CFRP-concrete interface with end anchorage in hygrothermal environments

Externally bonded reinforcement (EBR) of reinforced concrete (RC) structures with fiber reinforced polymer (FRP) is unable to meet the requirements of the engineering. Because premature debonding failure limits the usage scenario of the EBR method, which cannot fully utilize the high tensile performance of FRP. More and more studies focus on the improvement of the EBR method by extra anchors on the FRP-concrete interface to improve its ultimate strength. Considering the influence of environmental conditions on the FRP-concrete interface with anchorage, the application of extra anchorage under hygrothermal environments has to be investigated. The paper optimizes the existing end mechanical anchorage to avoid damage to carbon fiber reinforced polymer (CFRP) and concrete substrate. The compressive pressure exerted on the CFRP laminate can be controlled by adjusting the torque on the end anchorage. A series of end-anchoted double-lag shear tests under different hygrothermal conditions were carried out for invesitgating the bond behavior of CFRP-concrete interface. The test results showed that the load increment of the ultimate strength of the CFRP-concrete interface decreased with the increase in temperature and relative humidity. Correspondingly, friction surfaces due to the compression provided by end anchorage changed from concrete-concrete interface to the concrete-adhesive or adhesive-CFRP interfaces. The relationship between friction coefficient and temperature and relative humidity was built. The shear stress and slip distribution curves were calculated from the strain distribution functions fitted from the strain data measured by DIC. Fracture energy for the CFRP-concrete bond was estimated, and the bond-slip relationship for the hygrothermal conditions was constructed.

Synthesis of a Multielement Flame Retardant and Its Application in Epoxy Resin

For the purpose of obtaining flame-retardant epoxy resin (FREP) with exceptional comprehensive properties, a multielement flame retardant SVPM was synthesized by sulfathiazole, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), methylvinyldichlorosilane and vanillin. The effects of SVPM on the thermal stability, heat resistance, mechanical behavior and flame retardancy of epoxy resin (EP) were systematically revealed, and the flame-retardant mechanism of SVPM was deeply explored. In the presence of only 0.12 wt% phosphorus content in the system, FREP achieved V-0 rating of vertical combustion (UL-94) and the limiting oxygen index (LOI) value reached 31.1%. Additionally, SVPM reduced the smoke and heat release of EP. The mechanical properties of EP were enhanced by SVPM; specifically, the maximum increment of tensile strength and flexural strength of FREP were 26.23% and 16.67% respectively. The investigation of flame-retardant mechanism showed that the phosphorus-containing free radicals and SO2 decomposed by SVPM can quench the active free radicals in the combustion process, thus interrupting the chain reaction of combustion, and the noncombustible gas generated by SVPM during combustion can reduce the concentration of combustible volatiles. In the condensation phase, phosphoric acid and silicon dioxide produced by SVPM degradation can promote the stability and densification of the char layer, eventually effectively reducing the combustion intensity.

Study on the tensile strength of plastic fiber reinforced M20 grade self-compacting bacterial concrete using a novel microbial technique Microbial induced calcite precipitation

Aim: The objective of this study is to quantify the influence of plastic fiber on the tensile strength of self-compacting concrete using a novel microbial technique Microbial induced calcite precipitation. Materials and Methods: There are 2 groups taken for the study and a total of 18 samples were prepared per group with Gpower (80%). Group-1 refers to the conventional self-healing concrete and group-2 refers to the plastic fiber reinforced self-compacting. concrete. The number of samples was calculated using clinical software by adopting the values from previously published research papers. The independent sample T-test has been carried out using SPSS software version 21 which shows a clear increment in the tensile strength of the fiber reinforced self-compacting concrete. Result: Tensile strength of plastic fiber reinforced self-compacting concrete increased by 3.73% when compared with the normal self-compacting concrete. The standard deviation of the tensile strength of plastic reinforced bacterial concrete was 0.28965. A significant difference between the two groups was observed with a p-value of 0.010 (p<0.05) Conclusion: From this experimental study it is concluded that the plastic fiber reinforced M20 grade self-healing concrete has greater tensile strength than the normal self-compacting concrete.

Effective use of biochar as an additive for alkali-activated slag mortar production

This research aimed at assessing the feasibility of activating biochar and ground granulated blast furnace slag (GGBS) combination using a blend of sodium carbonate and sodium hydroxide as the alkaline activator as a potential sustainable construction material. Taguchi Orthogonal experimental design was used to optimise the mix proportions considering three distinct biochar types (Rice husk biochar- (RB) and two sewage sludge biochar types), three biochar replacement levels (1, 2 and 5%) and three Na2O contents (6, 8 and 10%) as the parameters. The effect of biochar on the compressive strength, flowability and setting time was tested. The hydration mechanisms of biochar supplemented alkali-activated slag (AAS) were studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and 29Si nuclear magnetic resonance (NMR). In view of the overall performance in compressive strength, flow and setting time, the use of 2% RB with 10% Na2O content was identified to be the optimum combination. In contrast to the control mix, the optimum mix showed increment of compressive strength at 3-, 7-, 28- and 56-days of 16.5%, 13.5%, 7.4% and 12.2% respectively. Hydration analyses revealed that RB enhanced the formation of hydration products. Such improvements to the AAS product has potentially been introduced by the biochar's high-water absorption and retention property.

Mussel-inspired ferric ion-polydopamine complex as a facile, green and efficient platform to functionalize carbon fiber for improving interfacial adhesion of composites

A mussel inspired co-deposition of ferric ion-polydopamine (PDA) is explored and constructed on carbon fiber via facile dip-coating strategy for the first time to realize the enhancement in interfacial adhesion of epoxy composites. Varied contents of ferric ion are designed to allow comparison how the contents of formed complexes affect the surface characteristics of fiber and interfacial adhesion of composites. Compared with pure PDA modified fiber, the size and number of PDA nanospheres attached on fiber first declines distinctly and then increases as the addition level of ferric ions raises, but the coordination product of both bis-and tris-Fe3+-catechol complexes exist, only the yield of complexes varies with the addition amount of FeCl3. This indicates that the level of Fe3+ ions obviously impact DA oxidation, not the complex product. Increments in interfacial shear strength across all ferric ion-PDA complex modified fibers are noticed, associating with the stronger Fe3+…O coordination bonds that could enhance the interfacial crosslinking density. However, the optimal IFSS is attainable when appropriate amount of Fe3+ ions were added, which endows the fiber with good resin wettability. The ferric ion-PDA complex assisted surface modification demonstrated to be an effective and feasible avenue in interphase tuning of fiber reinforced composites, which could be also anticipated to extend to other metallic ion-PDA complexes.

Highly ductile and mechanically strong Al-alloy/boron nitride nanosheet composites manufactured by laser additive manufacturing

Laser metal deposition (LMD) is one of the prospective additive manufacturing (AM) processes to fabricate metal-based nanocomposites. In this study, aluminum alloy (AlSi10Mg) was reinforced by boron nitride nanosheets (BNNSs) via LMD method. High speed ball-milling was used to mix AlSi10Mg powder with BNNSs at fraction range 0.05–0.2 wt%. Comprehensive morphology analysis as well as structure-property relations were investigated. The study showed that adding BNNSs into Al-alloy via LMD process not only promoted the hardness (40 %) and mechanical properties of the matrix (24 %, 100 % and 96 % increments in ultimate tensile strength, yield strength and Young's modulus, respectively), but also significantly improved its ductility (∼300 % increase). This has been observed clearly in fracture analysis where ductile fracture features were the dominant mode for all prepared samples. According to the observations by optical microscopy and electron backscattered diffraction, BNNSs have a crucial effect on grain refinement; grain size reduced from ∼30.4 to 17.5 μm upon the addition of 0.2 wt% of BNNSs. In addition, during LMD process, hard mesophase of aluminum nitride was formed which assisted BNNSs in reinforcing the Al-alloy. The results helped to understand the microstructure changes and mechanical properties improvements when LMD method was used.

Cumulative muscle strength and risk of diabetes: A prospective cohort study with mediation analysis

AimsPrevious studies assessing the association of muscle strength with risk of diabetes have seldomly accounted for the cumulative exposure over time. This study examined the association of 4-year cumulative muscle strength with risk of diabetes in middle-aged and older adults. MethodsWe included participants without diabetes, who had 3 repeated measurements of muscle strength, which was assessed by grip strength (normalized by body-weight) and chair-rising time, over 4 years. Cumulative muscle strength was calculated based on trapezoid rule. Logistic regression analysis and mediation analysis for cumulative blood pressure were performed. ResultsWe included 3731 and 3799 participants with data on cumulative grip strength and cumulative chair-rising time, respectively. The odds of diabetes were gradually reduced with increments in cumulative grip strength or decrements in cumulative chair-rising time, with the corresponding odds ratio being 0.79 and 0.89 per 1 standard deviation change after multivariable-adjustment. Cumulative systolic blood pressure mediated 10.8% and 14.2% of the associations of diabetes with cumulative grip strength and cumulative chair-rising time, respectively. Cumulative grip strength also correlated inversely with blood pressure, glycemia, and inflammation. ConclusionsHigher cumulative muscle strength was associated with lower risk of diabetes and better cardiometabolic health in middle-aged and older Chinese adults.

Effects of Mg2Sn precipitation on the age-hardening and deformation behaviour of a Mg-Sn-Al-Zn alloy

The influences of Mg2Sn precipitation on the age-hardening and deformation behaviour of a Mg-4Sn-3Al-1Zn (wt.%) alloy have been systematically investigated via the assistance of analytical electron microscopy and X-Ray Computed Tomography (XCT) techniques. The Mg-4Sn-3Al-1Zn alloy shows a moderate hardening response during the ageing heat treatment at 175 °C, and a ∼35% increment of yield tensile strength was achieved with significantly deteriorated tensile elongation under the peak-aged condition. Nanosized Mg2Sn precipitates are uniformly distributed within grains, improving tensile strength properties. In addition, coarsened Mg2Sn precipitates can be observed along with precipitate-free zones (PFZs) at grain boundaries. During tensile deformation of the solution-treated alloy, plastic strain tends to be localized in the slip band array regions in grain interiors. For the as-aged alloy, strain localization primarily occurred in the PFZs. The degraded tensile ductility was associated with the initiation of early intergranular microcracks caused by coarse grain boundary Mg2Sn precipitates and PFZs. The results provide insights and implications for the development of affordable Mg alloys with a balanced combination of strength and ductility.

Nonlinear analysis of FRP-concrete-steel solid columns

In order to study the axial compression performance of the FRP (fiber reinforced polymer)-concrete-steel solid columns (FCSSC), the nonlinear analysis program of FCSSC was compiled in this paper. The program was verified by existing tests, and the impacts of FRP tube thickness, steel tube thickness, outer radius of steel tube, steel tube strength and concrete strength were examined. The outcomes showed that the calculated results agreed with the experimental results. It demonstrated the way that the program could precisely reflect the strain of FCSSC under various degrees of load and gauge a ultimate load of FCSSC. The increment of steel tube thickness, outer radius of steel tube and concrete strength on the bearing capacity of FCSSC were chiefly reflected in the increment of initial stiffness. The improvement of FRP tube thickness could provide greater constraining force. The increment of steel tube strength could expand the load at the inflection point on the load-longitudinal strain curve. The research results can give a reference to the use of the new structure.

COST-EFFECTIVE STRATEGY OF RETROFIT FOR RC BUILDINGS IN DEVELOPING COUNTRIES BASED ON THE SEISMIC PERFORMANCE INDEX

Seismic retrofit for buildings have been proved effective to survive the past earthquakes in Japan. It will be effective in other countries whereas seismic retrofit is not popular in many developing countries. In this study, a strategy to cost-effectively progress seismic retrofit is proposed so as to be applicable in developing countries. The proposed strategy is numerically investigated by using a database on 582 RC buildings in Dhaka. The major result shows that the proposed strategy can identify buildings to be retrofitted and determine the increment of strength in terms of cost-effectiveness.

Cumulative Muscle Strength and Risk of Cardiovascular Disease and All-cause mortality: A Prospective Cohort Study

The existing literature regarding the association between muscle strength and cardiovascular disease (CVD) and all-cause mortality relies mostly on a single measurement of muscle strength but has seldomly focused on the accumulated exposure. This study explored the association between cumulative muscle strength and risks of CVD and all-cause mortality in middle-aged and older adults. A total of 6,972 patients from the China Health and Retirement Longitudinal Study, who underwent 3 repeated measurements of muscle strength over 4 years and were followed-up for another 3 years for CVD and all-cause mortality outcomes participated in this study. Muscle strength was evaluated by grip strength and chair-rising time. Cumulative muscle strength was calculated as the area under the curve. Odds ratio (OR) and 95% confidence intervals (CIs) were analyzed. The odds of CVD and all-cause mortality decreased as cumulative grip strength increased or cumulative chair-rising time decreased. For each 1 standard deviation (SD) increment in cumulative grip strength, the multivariable-adjusted OR for CVD and all-cause mortality were 0.81 (95% CI 0.73-0.91) and 0.85 (95% CI 0.73-0.99), respectively. For each 1 SD decrease in cumulative chair-rising time, the corresponding OR were 0.81 (95% CI 0.75-0.88) and 0.87 (95% CI 0.77-0.98), respectively. However, neither the change-slope of grip strength nor that of chair-rising time was related to decreased OR of CVD or of all-cause mortality. Cumulative muscle strength was associated with a reduced risk of CVD and all-cause mortality in middle-aged and older Chinese adults.

Adsorptive removal of dichlorophenoxyacetic acid (2,4-D) using novel nanoparticles based on cationic surfactant-coated titania nanoparticles.

A novel nanomaterial based on cationic surfactant-coated TiO2 nanoparticle (CCTN) was systematically fabricated in this work. Synthesized titania nanoparticles were thoroughly characterized by XRD, FT-IR, HR-TEM, TEM-EDX, SEM with EDX mapping, BET, and ζ potential measurements. The adsorption of cationic surfactant, cetyltrimethylammonium bromide (CTAB), on TiO2 was studied under various pH and ionic strength conditions. Adsorption of CTAB on TiO2 increased with ionic strength increment in the presence of hemimicelle monolayer structure, indicating that nonelectrostatic and electrostatic forces control CTAB uptake. CTAB adsorption isotherms on TiO2 were according to a two-step model. Potential application in pesticide removal of 2,4-dichorophenoxy acetic acid (2,4-D) using CCTN was also studied. Optimum parameters for 2,4-D treatment through adsorption technique were pH 5, adsorption time of 120min, and CCTN dosage of 10mg·mL-1. Very low 2,4-D removal efficiency using TiO2 without CTAB coating was found to be approximately 28.5% whereas the removal efficiency was up to about 90% by using CCTN under optimum conditions, and the maximum adsorption capacity of 12.79mg·g-1 was found. Adsorption isotherms of 2,4-D on CCTN were more suitable with the Langmuir model than Freundlich. Adsorption mechanisms of 2,4-D on CCTN were mainly governed by Columbic attraction based on isotherms and surface charge changes.