Abstract This paper involves the study on hardened and durability properties of concrete at two different grades containing silica fume (SF) with various replacement percentages. Investigation performance SF was performed for M25 M40 0, 5, 10, 15 % levels 7, 14, 28, 90 days. The behavior autogenous shrinkage studied both in sealed (SC) unsealed conditions (USC). workability examined by slump co...

Electrically conductive roller-compacted concrete (ERCC) is a novel functional material, which can solve the problems of low efficiency artificial snow removal and deicing on expressway airport runway difficulty in temperature control dam engineering structures. In this study, we designed ERCC conducted an experimental study numerical simulations ERCC. The improvement mechanism su...

It has long remained elusive whether ${\mathrm{CuCo}}_{2}{\mathrm{S}}_{4}$ thiospinel shows bulk superconductivity (SC). Here we clarify the issue by studying samples of sulfur-deficient ${\mathrm{CuCo}}_{2}{\mathrm{S}}_{3.7}$ and sulfurized ${\mathrm{CuCo}}_{2}{\mathrm{S}}_{4}$. The sample a smaller lattice constant $a=9.454$ \AA{}, it is not superconducting down to 1.8 K. After full sulfuriza...

The construction industry generates a considerable amount of waste. Faced with this undesirable situation, the ready-mix concrete sector, in particular, has invested energy and resources into reusing its own waste in its production process as it works towards the goal of more sustainable construction. This study examines the feasibility of incorporating two types of concrete waste, which curren...

The susceptibility of structural concrete to early-age cracking depends on material composition, methods of processing, structural boundary conditions, and a variety of environmental factors. Computational modeling offers a means for identifying primary factors and strategies for reducing cracking potential. Herein, lattice models are shown to be adept at simulating the thermal-hygral-mechanica...

This paper presents the residual mechanical properties of concrete made with crushed bricks and clay roof tile aggregates after exposure to high temperatures. One referent mixture and eight mixtures with different percentages of replacement of natural aggregate by crushed bricks and roof tiles are experimentally tested. The properties of the concrete were measured before and after exposure to 2...

Response surface methodology (RSM) was used to study the effect of three factors, sulfur dioxide, ethanol and glucose, on the growth of wine spoilage yeast species, Zygosaccharomyces bailii, Schizosaccharomyces pombe, Saccharomycodes ludwigii and Saccharomyces cerevisiae. Seventeen central composite rotatable design (CCRD) trials were designed for each test yeast using realistic concentrations ...

We analyze a signature scheme described in a recent Internet Draft, and highlight a variant (based on prior work of Micali and Leighton) that offers improved concrete security.