I love these videos, they help me a lot. I particularly appreciate the clear and concise instructions, attention to detail, and wonderfully produced videos where everything is on display. I just wanted to mention at around 0:25 the presenter (if he mentioned his name, I didn't catch it, sorry) states that "grout overtime becomes stronger, harder, and more brittle." OK, from the point of view of mechanics, when a material is hard it is brittle which is the direct opposite of being strong. If the grout (cement-based) became stronger with age, it would be like a metal---not easy to break, undergoing plastic deformation rather then fracture when met with force. This is why we measure tensile strength and hardness as separate qualities of a material. BTW, it is the same with humans, those who are strong are not hardhearted. :))
Are the worlds you are looking for resilience and toughness? Being brittle is not quite the opposite of strength. On the contrary, very high strength materials like ceramics often have miniscule maximum elongation before they break. Metal is perceived as "strong" because it is in the "sweet spot" where it can continue to oppose high forces while undergoing elastic or plastic deformation. On the other hand I do believe grout isn't that strong even after it fully hardens.
@@milithemuffin4534 Hi, thx for answering, really appreciate that. No, the words I am looking for is strength not "resilience," the latter is not a measurable quality in materials. Yes, toughness can be measured (or calculated) and clay ceramics are not tough. High strength and high toughness are usually mutually exclusive in construction materials. OK, bricks have compressive strength but not tensile strength which makes them fracture easy but bear load well. And I still believe that hard materials are brittle and hardness is not strength. That's why we reinforce concrete with steel, right? :)) Metals are not "perceived" as strong, they are measured in tests as such. When subjected to strain and stress, ceramic materials made from fired clay or melted sand (glass) are not capable of either elastic or, especially, plastic deformation because their internal structures do not allow any displacements of bonds or plastic flow as metallic crystalline structures do. However, not all ceramics are made form clay. It s a huge class of non-metallic materials. Cheers. . .
In some cases, like if the channel between tiles is deep enough, you can. However, in most cases (bathroom and kitchen tiles) the channels aren't deep enough for the grout to bond to just the tile edges. If you're replacing grout, I assume it's not just because the job wasn't finished or you want a different color. It's probably because it's constantly getting moldy or it's crumbling. Mold and/or heavy metal deposits (iron, calcium, copper, zinc, etc) form on grout that has worn down from water usage. The smooth top layer chips away to a more rugged layer that allows for said things to develop. If the grout is brittle or "wet" even when everything else is dry, it probably didn't cure properly. In both cases, grout wants a hard surface to bond to. If you put new grout onto grout facing these issues, it won't set properly, leading you back to the start in a few months. Depending on water hardness and shower usage, grout should last a couple years to a decade if done properly.
I love the way you approach PPE! Starting with the consequences.
Clear and simple, really helpful information! Thanks
I love these videos, they help me a lot. I particularly appreciate the clear and concise instructions, attention to detail, and wonderfully produced videos where everything is on display. I just wanted to mention at around 0:25 the presenter (if he mentioned his name, I didn't catch it, sorry) states that "grout overtime becomes stronger, harder, and more brittle." OK, from the point of view of mechanics, when a material is hard it is brittle which is the direct opposite of being strong. If the grout (cement-based) became stronger with age, it would be like a metal---not easy to break, undergoing plastic deformation rather then fracture when met with force. This is why we measure tensile strength and hardness as separate qualities of a material. BTW, it is the same with humans, those who are strong are not hardhearted. :))
Are the worlds you are looking for resilience and toughness?
Being brittle is not quite the opposite of strength. On the contrary, very high strength materials like ceramics often have miniscule maximum elongation before they break.
Metal is perceived as "strong" because it is in the "sweet spot" where it can continue to oppose high forces while undergoing elastic or plastic deformation.
On the other hand I do believe grout isn't that strong even after it fully hardens.
@@milithemuffin4534 Hi, thx for answering, really appreciate that. No, the words I am looking for is strength not "resilience," the latter is not a measurable quality in materials. Yes, toughness can be measured (or calculated) and clay ceramics are not tough. High strength and high toughness are usually mutually exclusive in construction materials.
OK, bricks have compressive strength but not tensile strength which makes them fracture easy but bear load well. And I still believe that hard materials are brittle and hardness is not strength. That's why we reinforce concrete with steel, right? :)) Metals are not "perceived" as strong, they are measured in tests as such.
When subjected to strain and stress, ceramic materials made from fired clay or melted sand (glass) are not capable of either elastic or, especially, plastic deformation because their internal structures do not allow any displacements of bonds or plastic flow as metallic crystalline structures do.
However, not all ceramics are made form clay. It s a huge class of non-metallic materials.
Cheers. . .
Thank you for your TedTalk! I love learning new things!
Pole, great video
Glad you enjoyed it! Watch this space. More videos to come!
Hi, Thank you so much for your videos. I hadn't a clue..then I found you! 😊
Could you put a link for the multi tool and blade please?
@@claireemptage5289 of course. See below - www.tilewarehouse.co.uk/dex-hd-grout-rake/
How long do you suggest allowing shower grout to dry before using it-24hrs, 48, …?
Thank you!!!
You'll need a week to remove all that grout.
It's absolutely time to re-grout the bathroom XD
Thanks
Great vid many thanks
The accent alone gets you a "like"😊
I don't hear any accent.
Could you remove grey grout and regrout with white?
Yes, but you just need to spend the time removing the old grout fully
Grout taken out!
Why can’t you just regrout over the old grout
In some cases, like if the channel between tiles is deep enough, you can. However, in most cases (bathroom and kitchen tiles) the channels aren't deep enough for the grout to bond to just the tile edges.
If you're replacing grout, I assume it's not just because the job wasn't finished or you want a different color. It's probably because it's constantly getting moldy or it's crumbling.
Mold and/or heavy metal deposits (iron, calcium, copper, zinc, etc) form on grout that has worn down from water usage. The smooth top layer chips away to a more rugged layer that allows for said things to develop.
If the grout is brittle or "wet" even when everything else is dry, it probably didn't cure properly.
In both cases, grout wants a hard surface to bond to. If you put new grout onto grout facing these issues, it won't set properly, leading you back to the start in a few months.
Depending on water hardness and shower usage, grout should last a couple years to a decade if done properly.
@ProperDIY 🙂