Is there any open source software available to model the microstructure of cementitious composites?

I will like to model the microstructure of concrete/mortar, is there any software to model the resulting products? Thanks

31 December 2018 8,353 2 View

Freeze and thaw test for concrete according to ASTM C 666, what alternative test or parameter can be used to replace the dynamic testing apparatus?

One of the apparatus required for freeze and thaw test according to ASTM C666 is the dynamic testing apparatus. This apparatus is used to obtain the relative dynamic modulus of elasticity and...

11 December 2018 8,610 2 View

What is the best way to coat PVA fibers with oil agent?

PVA fibers are modified with oiling agents to reduce bonding between the fiber and the cementitious matrix. What is the best type of oiling agent and method of application is most...

11 December 2018 6,141 1 View

Is there any non destructive test that can be improvised in the lab to estimate the strength and permeability properties of concrete?

Non destructive tests equipment for concrete are quite expensive and not readily available. Is there any non destructive test that can be improvised or built with commonly available materials to...

10 November 2018 6,485 4 View

What are alternative cheaper fibers that can be used for engineered cementitious composites?

The most used fibers for ECC are PVA and PE, however, these fibers are very expensive. Are there other cheaper and greener materials that can be used as fiber in ECC?

10 November 2018 2,797 24 View

Why is high volume slag associated with high shrinkage in cementitious composites?

I will like to know why there is always high shrinkage when slag is used at larger percentage replacement of cement. The reasons in terms of its chemical reactions with OPC and the physical and...

10 November 2018 368 3 View

What is the best way to carry out accelerated corrosion tests in Reinforced concrete?

Currently there seem to be no standard that covers how to carry out an accelerated corrosion test for steel in a reinforced cementatious composite. However, several studies have explored different...

10 November 2018 4,832 5 View

What are the emerging supplementary cementatious materials that can be used to replace cement?

The use of supplementary cementitious materials (SCMs) is increasing rapidly as they can be used to partially or totally replace OPC in concrete. The most common types of SCMs are fly ash, slag,...

10 November 2018 6,331 13 View

How to improve the sustainability of ECC?

Engineered cementatious composites are high performance composite and are gaining huge research recently due to their enhanced ductility and durability. What are the major ways to improve the...

10 November 2018 6,667 13 View

How to get percentage contribution of factors in design expert?

I'm using design expert software for the design of the influence of different factors in my experiment. However, I couldn't get any section that shows the percentage contribution of each factor on...

10 November 2018 7,625 3 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

What are some of the research gaps in machine learning and artificial intelligence in africa?

i would to know some of the research gaps in the artificial intelligence field in most african countries.

03 March 2021 6,145 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature)?

1. What is the impact of having different scales in a survey? and how can we solve this problem before and after data collection (Literature-based reflection)? Thank you for your time and for...

03 March 2021 2,870 3 View