http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Strength and permeation properties of alccofine activated low calcium fly ash geopolymer concrete
Bharat Bhushan Jindal,Dhirendra Singhal,Sanjay Sharma,Aniket Yadav,Shubham Shekhar,Abhishek Anand 사단법인 한국계산역학회 2017 Computers and Concrete, An International Journal Vol.20 No.6
This paper presents the experimental investigations on the compressive strength and permeation properties of geopolymer concrete prepared with low calcium fly ash as the primary binder activated with different percentage of Alccofine. The durability aspect was investigated by performing permeable voids and water absorption tests since permeability directly influences the durability properties. The test results show that Alccofine significantly improves the compressive strength and reduces the water permeability thus enhances the durability of geopolymer concrete at ambient curing regime which encourages the use of geopolymer concrete at ambient curing condition thus promising its use in general construction also.
Enhancing mechanical and durability properties of geopolymer concrete with mineral admixture
Bharat Bhushan Jindal,Dhirendra Singhal,Sanjay Sharma,Parveen 사단법인 한국계산역학회 2018 Computers and Concrete, An International Journal Vol.21 No.3
This paper approaches to improve the mechanical and durability properties of low calcium fly ash geopolymer concrete with the addition of Alccofine as a mineral admixture. The mechanical and durability performance of GPC was assessed by means of compressive strength, flexural strength, permeability, water absorption and permeable voids tests. The correlation between compressive strength and flexural strength, depth of water penetration and percentage permeable voids are also reported. Test results show that addition of Alccofine significantly improves the mechanical as well as permeation properties of low calcium fly ash geopolymer concrete. Very good correlations were noted between the depth of water penetration and compressive strength, percentage permeable voids and compressive strength as well as between compressive strength and flexural strength.
Feasibility study of ambient cured geopolymer concrete -A review
Jindal, Bharat Bhushan Techno-Press 2018 Advances in concrete construction Vol.6 No.4
Geopolymer concrete is a fastest developing field of research for utilizing industrial and agro waste materials as an alternative for Portland cement based concrete. Geopolymers are formed by the alkaline activation of aluminosilicates rich materials termed as geopolymerization. The process of geopolymerization requires elevated temperature curing which restricts its application to precast industry. This review summarizes the work carried out on developing the geopolymer concrete with the addition of various mineral admixtures at ambient curing temperature conditions. An overview of studies promoting the geopolymer concrete in general building construction is presented. Literature study revealed that geopolymer concrete with the addition of admixtures can exhibit desirable properties at ambient temperature conditions.
Improving compressive strength of low calcium fly ash geopolymer concrete with alccofine
Jindal, Bharat Bhushan,Singhal, Dhirendra,Sharma, Sanjay K.,Ashish, Deepankar K.,Parveen, Parveen Techno-Press 2017 Advances in concrete construction Vol.5 No.1
Geopolymer concrete is environmentally friendly and could be considered as a construction material to promote the sustainable development. In this paper fly ash based geopolymer concretes with different percentages of alccofine were made by mixing sodium hydroxide and sodium silicate as an alkaline activator and cured at ambient as well as heat environment in an electric oven at $90^{\circ}C$. Effects of various parameters such as the percentage of alccofine, curing temperature, a period of curing, fly ash content, was studied on compressive strength as well as workability of geopolymer concrete. The study concludes that the presence of alccofine improves the properties of geopolymer concrete during a fresh and hardened state of concrete. Geopolymer concrete in the presence of alccofine can be used for the general purpose of concrete as required compressive strength can be achieved even at ambient temperature. The 28 days compressive strength of 73 MPa, when cured at 90-degree Celsius, confirmed that it is also very suitable for precast concrete components.
A Fuzzy based Routing Protocol for Delay Tolerant Network
Neelam Malik,Shailender Gupta,Bharat Bhushan 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.1
Delay Tolerant Network (DTN) is a wireless ad hoc network that intends to provide communication between pair of nodes in spite of having intermittent connectivity and long delays. The nodes are buffer and energy constrained. To provide communication in such scenario, a sturdy routing mechanism is needed. In this paper we propose a new routing technique based on fuzzy logic for intermittently connected network. Also an effort has been made to evaluate the performance of the proposed routing strategy in realistic environment (having obstacles) in MATLAB. The simulation results show that the performance of the network is improved using fuzzy logic based routing strategy and the results of realistic environment are quite different from idealistic environment.