scholarly journals Optimization for Mix Proportion of Reactive Powder Concrete Containing Phosphorous Slag by Using Packing Model

2020 ◽  
Vol 18 (9) ◽  
pp. 481-492
Author(s):  
Yanzhou Peng ◽  
Xiang Li ◽  
Yujiao Liu ◽  
Binhe Zhan ◽  
Gang Xu
Keyword(s):  
Reactive Powder Concrete ◽  
Packing Model ◽  
Mix Proportion ◽  
Reactive Powder ◽  
Phosphorous Slag

scholarly journals Effect of Mix Proportion Parameters on Behaviors of Basalt Fiber RPC Based on Box-Behnken Model

2019 ◽  
Vol 9 (10) ◽  
pp. 2031 ◽  
Author(s):  
Hanbing Liu ◽  
Shiqi Liu ◽  
Shurong Wang ◽  
Xin Gao ◽  
Yafeng Gong
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Basalt Fiber ◽  
Fiber Content ◽  
Reactive Powder Concrete ◽  
Basalt Fibers ◽  
Factors Affecting ◽  
Remarkable Effect ◽  
Mix Proportion ◽  
Reactive Powder

Basalt fibers are widely used in the modification of concrete materials due to its excellent mechanical properties and corrosion resistance. In this study, the basalt fibers were used to modify reactive powder concrete (RPC). The effect of four mix proportion parameters on the working and mechanical properties of basalt fiber reactive powder concrete (BFRPC) was evaluated by the response surface methodology (RSM). The fluidity, flexural and compressive strength were tested and evaluated. A statistically experimental model indicated that D (the silica fume to cement ratio) was the key of interactions between factors, affecting other factors and controlling properties of BFRPC. The increase in basalt fiber content had a remarkable effect on increasing the flexural and compressive strength when D = 0.2. The addition of basalt fiber obviously improved the mechanical properties of RPC. While when D = 0.4, the decrease of fiber content and the increase of quartz sand content could increase the compressive strength.

Mix Proportion Optimization and Shrinking of New Developed Reactive Powder Concrete

2009 ◽  
Vol 405-406 ◽  
pp. 37-43 ◽  
Author(s):  
Heng Jing Ba ◽  
Ai Li Guo ◽  
Ying Zi Yan
Keyword(s):  
Raw Materials ◽  
Steel Fibers ◽  
Reactive Powder Concrete ◽  
Particle Sizes ◽  
Heat Curing ◽  
Mix Proportion ◽  
Binder Ratio ◽  
New Type ◽  
Dry Shrinkage ◽  
Reactive Powder

According to the theory of dense packing of particle, the theoretical particle size distribution of raw materials of RPC (Reactive Powder Concrete) was calculated. On the basis, the ratio of raw materials with different range of particle sizes of the RPC was determined by mechanical experiments. According to the determined ratio, a new type RPC was prepared by using flying ash and slag to replace part of cements and quartz flour, respectively. The workability, mechanical properties of the new RPC with different mix proportion and its shrinkage, cured at the normal temperature and 60°C, respectively, were studied. The results show that when water-binder ratio is 0.23, fly ash replaces 30% cements, slag replaces 50% quartz flour and superfine steel fibers percentage in volume is 2%, the compressive and flexural strength of prepared RPC are 160.1MPa and 25.3MPa, respectively, and after 3days heat curing (60°C), the dry shrinkage of it in 28days age reaches 299um/m. In addition, the fluidity of the new RPC is 258mm and meets requirements of workability of the pump concrete.

Effects of Packing Degree and Calcium-Silicon Ratio of Cementitious Material on Strength of Reactive Powder Concrete

2010 ◽  
Vol 168-170 ◽  
pp. 1034-1037
Author(s):  
Tao Ji ◽  
Bao Chun Chen ◽  
Yi Zhou Zhuang ◽  
Zhi Bin Huang ◽  
Yong Ning Liang
Keyword(s):  
Silicon Dioxide ◽  
Cementitious Materials ◽  
Strength Test ◽  
Cementitious Material ◽  
Molar Ratio ◽  
Reactive Powder Concrete ◽  
Mix Proportion ◽  
Study Results ◽  
Calcium Silicon ◽  
Reactive Powder

Aim & Goff model was used to predict the packing degree of cementitious materials including cement and silica fume. The mix proportions of reactive powder concrete (RPC) with different packing degree and calcium-silicon ratio of cementitious materials were designed and a strength test was carried out. The study results reveal that the flexural strength and compressive strength of RPC are related to the packing degree and calcium-silicon ratio of cementitious materials. For the mix proportion of RPC with the calcium- silicon molar ratio of 1.353 that is slightly less than the theoretical value of 1.42, where calcium hydroxide can react with silicon dioxide more fully, its strength of RPC approaches summit although its packing degree of cementitious material is not the largest one.

Effects of Packing Density and Calcium- Silicon Ratio of Ternary Cementitious Material System on Strength of Reactive Powder Concrete

2011 ◽  
Vol 261-263 ◽  
pp. 197-201
Author(s):  
Tao Ji ◽  
Bao Chun Chen ◽  
Feng Li ◽  
Yi Zhou Zhuang ◽  
Zhi Bin Huang ◽  
...  
Keyword(s):  
Fly Ash ◽  
Silica Fume ◽  
Packing Density ◽  
Cementitious Material ◽  
Reactive Powder Concrete ◽  
Material System ◽  
Mix Proportion ◽  
Study Results ◽  
Calcium Silicon ◽  
Reactive Powder

Aim & Goff model was used to predict the packing density of cementitious material including cement, ultra-pulverized fly ash and silica fume. The mix proportions of reactive powder concrete (RPC) with different packing density and calcium-silicon ratio of cementitious material were designed, and a strength test was carried out. The study results reveal that the flexural strength and compressive strength of RPC are related to the packing density and calcium-silicon ratio of cementitious material. For the mix proportion of RPC with the calcium-silicon ratio of 1.179, calcium hydroxide reacts with silicon dioxide fully, and the superfluous ultra-pulverized fly ash and silica fume fill the voids of RPC. The packing density of its cementitious material is the largest, and its strength approaches summit.

scholarly journals Experimental Study on Reactive Powder Concrete under Flexural Loading

2018 ◽  
Vol 7 (2.24) ◽  
pp. 552
Author(s):  
Jeganmurugan P ◽  
Rakesh Senthil Kumar G V ◽  
Sivasharmina M ◽  
Sowmiya S ◽  
Vasanthan M
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Silica Fume ◽  
High Strength ◽  
Reactive Powder Concrete ◽  
Split Tensile Strength ◽  
Mix Proportion ◽  
Compressive Strength Test ◽  
Trial And Error Method ◽  
Reactive Powder

Reactive powder concrete (RPC) is ultra high strength with advanced mechanical properties. Reactive powder concrete is a concrete without coarse aggregate, contains cement, silica fume, quartz sand, quartz powder, super plasticizer, steel fibre and polypropylene fibre with very low water cement ratio under normal curing condition. RPC has been produce with high compressive strength ranging from upto 800 MPa with high flexural strength up to 50 MPa and in some cases provided with absences of steel reinforcement. Mix proportions of RPC were found by trial and error method, the concrete cubes of size 100mmx100mmx100mm were cast for find compressive strength of NRPC at 7days. Concrete cubes and cylinders of sizes 100mmx100mmx100mm and 100mmx150mm have to be cast for finding compressive strength and split tensile strength at 28 days. Flexural strength of NRPC and MRPC will be find out by casting prism of size 500mmx 100mmx 100 mm. The optimum mix proportion has to be finalized by comparing the results of all concrete specimens. Compressive strength test results shows that addition of silica fume upto 0.22% will increase the compressive strength of reactive powder concrete.   

Fatigue behavior of unbonded prestressed reactive powder concrete beams after creep

2020 ◽  
Vol 62 (9) ◽  
pp. 951-956
Author(s):  
Luo Xuguo ◽  
Tan Zheng Long ◽  
Y. Frank Chen
Keyword(s):  
Concrete Beams ◽  
Fatigue Behavior ◽  
Reactive Powder Concrete ◽  
Reactive Powder
Sign in / Sign up

Export Citation Format

Share Document