Utilization of Granite powder and Glass Powder in Reactive Powder Concrete: Assessment of Strength and Long Term Durability Properties

2021 ◽  
Author(s):  
Venkatesan B ◽  
Kannan V ◽  
Sophia M
Keyword(s):  
Electrical Resistivity ◽  
Glass Powder ◽  
Construction Materials ◽  
Reactive Powder Concrete ◽  
Waste Glass Powder ◽  
Chloride Migration ◽  
One Year ◽  
Granite Powder ◽  
Reactive Powder

This paper aims to assess the mechanical and long-term durability performance of Reactive Powder Concrete (RPC) containing Granite Powder (GrP) as cement replacement and waste Glass Powder (GP) as quartz sand replacement. The workability and mechanical behaviour of RPC containing various proportions of GrP and GP are assessed for different w/b ratios (0.3, 0.35, 0.4 and 0.45). The water resistance and tightness of RPC are measured by monitoring the electrical resistivity, water absorption, sorptivity and chloride migration over a one year period. Results reveal that substitution of GrP and GP at optimum levels of 15% and 30% respectively enhances the performance of RPC with the achievement of satisfiable workability at a 0.35 w/b ratio. A significant increase in the resistance towards chloride penetration and electrical resistivity was also observed with increasing ages. Thus, glass powder and granite powder can be considered as alternative construction materials providing economical and ecological efficiency.

INVESTIGATION OF USING WASTE GLASS POWDER AS A SUPPLEMENTARY CEMENTITIOUS MATERIAL IN REACTIVE POWDER CONCRETE

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Shatha Hasan ◽  
Doaa Nayyef
Keyword(s):  
Compressive Strength ◽  
Glass Powder ◽  
Waste Glass ◽  
Reactive Powder Concrete ◽  
Concrete Aggregate ◽  
Supplementary Cementitious Material ◽  
Recycled Glass ◽  
Waste Glass Powder ◽  
Reactive Powder ◽  
Direct Tensile

Some mechanical behaviors were tested by investigations of compressive strength, and direct tensile, strength of reactive Powder concrete (RPC) containing recycled glass powder (RGP) as a supplementary, cementitious material. This study goals to survey the pozzolanic activity of recycled glass powder (RGP) up to (30%) silica fume replacement and its effect on the properties of recycled reactive powder concrete (RRPC) that made by waste glass (WG) and recycled fine concrete aggregate, which has not been investigated before. These properties contain compressive strength and direct tensile strength. Glass is principally composed of silica so that when waste glass is grind to micro particle size in RPC as a partial replacement of silica fume could be a substantial step to development of sustainable material. In this study, high strength reactive powder concrete (HSRPC) with mean compressive strength of 118.4 MPa at 28 days slightly decreased when 40% recycled fine concrete aggregate were used then the strength evolve afterward when 20% of waste glass powder WGP was utilized. The strength tests outcomes indicated that waste glass powder gave greater strength compared to ordinary reactive powder concrete.

scholarly journals Mechanical Behavior of Reactive Powder Concrete with Glass Powder Substitute

2015 ◽  
Vol 125 ◽  
pp. 617-622 ◽  
Author(s):  
Widodo Kushartomo ◽  
Ika Bali ◽  
Budi Sulaiman
Keyword(s):  
Mechanical Behavior ◽  
Glass Powder ◽  
Reactive Powder Concrete ◽  
Reactive Powder

scholarly journals LONG-TERM MEASUREMENTS OF EQUILIBRIUM EQUIVALENT RADON AND THORON PROGENY CONCENTRATIONS IN REPUBLIC OF SRPSKA DWELLINGS

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Zoran Ćurguz ◽  
Zdenka Stojanovska ◽  
Rosaline Mishra ◽  
Balvindar K. Sapra ◽  
Ilia V. Yarmoshenko ◽  
...  
Keyword(s):  
Indoor Environment ◽  
Geometric Mean ◽  
Construction Materials ◽  
Scientific Contribution ◽  
Calculated Ratio ◽  
One Year ◽  
Banja Luka ◽  
First Time ◽  
Thoron Progeny

The long–term measurements of radon and thoron equilibrium equivalent concentrations (EERC and EETC) were carried out the first time in Republic of Srpska in 25 schools of its capital Banja Luka and in its wider surroundings. After this successful survey, the measurements continued using the same type of the LR 115 nuclear track detectors, i.e., Direct Radon Progeny Sensors/Direct Thoron Progeny Sensors (DRPS/DTPS), and they were deployed in the 36 dwellings nearby the investigated schools. The detectors were exposed for one year period at 15–20 cm distance from the walls. The EERC and EETC were found to vary in the range from 6.3 to 14.4 Bq/m3and from 0.10 to 1.1 Bq/m3, with geometric mean 9.3 and 0.36, respectively. The same variance of EER and EET concentrations, measured in living and bedrooms of buildings built with different construction materials as well at different floors have been obtained. The insignificant correlations between EERC and EETC, show that these concentrations appeared to be independent in investigated dwellings. The calculated ratio of EETC to EERC ranged from 0.01 to 0.16 with the geometric mean of 0.04. The aim of this study is to give possible scientific contribution considering the explanation of EERC and EETC behavior in an indoor environment.

scholarly journals Investigation of Reactive Powder Concrete (RPC)

2018 ◽  
Vol 67 (1) ◽  
pp. 127-140 ◽  
Author(s):  
Stefania Grzeszczyk ◽  
Aneta Matuszek-Chmurowska
Keyword(s):  
Bending Strength ◽  
Close Contact ◽  
Concrete Strength ◽  
Mercury Porosimetry ◽  
Construction Materials ◽  
High Strength ◽  
Reactive Powder Concrete ◽  
Hardened Concrete ◽  
Porosity Reduction ◽  
Reactive Powder

Results of investigations of reactive powder concrete (RPC) are presented in the paper. Optimization of the concrete composition was performed to achieve the highest degree of grains packing based on the optimal graining curve according to Funk for dmax = 1000 μm and dmin = 0.1 μm. Cement, silica fume, quartz and sand powder were considered in the composition. Steel fibers addition of 25% by mass was applied. A very low water–to–binder ratio, amounting to 0.2, was reached applying novel generation of superplasticizers based on polycarboxylates. The RPC mixture remained fluid during 1 hour. The diameter of slump flow according to PN-EN standard amounted to 250 mm after 60 minutes. The hardened concrete RPC displayed high strength and durability. Compressive strength reached 145 MPa after 2 days and about 200 MPa after 28 days; the bending strength exceeded 50 MPa after 28 days. After 56 freezing/defrosting cycles in the deicing salt solution, the concrete has shown minimal salt scaling of only 0.0007 kg/m2. Therefore, frost resistance of the concrete studied can be rated as very good according to PN-EN standard. The SEM pictures proved the amorphous phase of hydrated calcium silicates (C-S-H) is the dominant phase within the RPC microstructure. Usually, the C-S-H phase tightly covers the quartz grains and is in close contact with the unreacted cement grains. Crystallites of the monosulphate (AFm) were also found. The concrete microstructure was compact; pores of a few micrometers were rarely observed. The RPC porosity was measured using the mercury porosimetry. Porosity reduction by almost twice (from 10.9% down to 4.4%) was found after the RPC curing from 2 to 28 days. In the same period, a fraction of small mezopores (diameter below 20 nm) increased from 39.8% to 77.1%. Based on the research results data, presented the RPC concrete can be regarded as an interesting alternative to other construction materials of enhanced explosion resistance. Key words: Reactive Powder Concrete, strength, durability, explosion resistance

scholarly journals An Experimental Model on the Mechanical Properties of Reactive Powder Concrete by using Cement Replacement of Glass Powder

2019 ◽  
Vol 8 (9S3) ◽  
pp. 398-402
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Glass Powder ◽  
Fine Sand ◽  
Reactive Powder Concrete ◽  
Building Structures ◽  
Split Tensile Strength ◽  
Super Plasticizer ◽  
Advance Material ◽  
Reactive Powder

Reactive Powder Concrete is a creating composite material that enables the solid business to advance material utilizes Generate financial advantages and building structures which are solid, strong and delicate to condition. RPC is another ultra-elite cement with extensive variety of capacities. RPC was created in the 1990s by Bouygues' research center in France. RPC speaks to another class of Portland concrete based material with compressive qualities of 120-200 MPa go. By presenting fine steel filaments. It has no coarse materials and contains little steel filaments that give extra strength. RPC incorporate Portland concrete, silica rage, fine sand, super plasticizer, water and steel strands. In this investigation, RPC by utilizing cement substitution of glass powder up to 30%. Likewise mechanical properties, compressive strength and split tensile strength were considered.

scholarly journals Mechanism Analysis of the Influence of Delay Period on Mechanical Properties of Reactive Powder Concrete

2021 ◽  
Vol 7 ◽  
Author(s):  
Xiaohui Wang ◽  
Qingxin Zhao ◽  
Xiaojun He ◽  
Shuang Zhang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Delay Period ◽  
Reactive Powder Concrete ◽  
Hydration Products ◽  
X Ray ◽  
Significant Difference ◽  
Calcium Silicon ◽  
Reactive Powder

In order to analyze the influence mechanism of delay period on the mechanical properties of reactive powder concrete (RPC), the compressive strength of RPC with delay periods of 18, 24, and 30 h was tested at the age of 7, 28, and 90 days, respectively. The results show that compared with the RPC with delay period of 18 h, the compressive strength of the RPC with delay periods of 24 and 30 h increases by 3.2 and 4.2%, respectively, and the long-term strength reduction ratio decreases by 22.8 and 71.9%, respectively. The constitutive model curves of RPC under different delay period show that the initial elastic modulus E increases with the delay period and the strength and rigidity of RPC increase with the extension of delay period. According to the non-evaporation water quantity test, it could be speculated that the quantities of hydration products of the RPC with delay periods of 24 and 30 h slightly increase compared with the RPC with delay period of 18 h. X-ray diffraction (XRD) analysis show that the delay periods of 24 and 30 h consume more 3CaO·SiO2 (C3S) and 2CaO·SiO2 (C2S) compared with delay period of 18 h. Seen from the scanning electron microscope (SEM) image, the structures of the three groups of samples are relatively dense and have no significant difference. Through energy dispersive X-ray spectroscopy (EDS) analysis, the calcium-silicon ratios of hydration products of the RPC with delay periods of 18, 24, and 30 h are 1.81, 1.56, and 1.54, respectively. The existence of C-S-H gel and Ca(OH)2 in hydration products is confirmed by thermogravimetric-differential scanning calorimetry (DSC-TG) analysis. An appropriate delay period (30 h in this paper) generates more hydration products, then improves the compactness of the internal structure and reduces the calcium-silicon ratio of hydration products, and it is conducive to the growth of RPC compressive strength and the stability of long-term compressive strength.

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